Soft & Squishy Sourdough Hamburger Buns

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BySarah | Grains & Greens Kitchen Posted on

Made with freshly milled soft wheat and tangzhong, these sourdough hamburger buns are fluffy, flavorful, and beautifully tender. (Bonus: they’re springy enough to pass the squish test!)

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Dreaming of fresh-milled sourdough hamburger buns that don’t scream “healthy alternative”?

So was I.

I wanted a bun that was unapologetically a burger bun: soft, squishy, springy, and sturdy enough to hold everything inside without falling apart. And you know what?

Freshly-milled flour isn’t something we need to work around. It’s the ingredient we choose on purpose.

Because a burger bun shouldn’t just carry the filling. It should bring something delicious to the table, too.

Yes, you can make bread with soft wheat!

Fresh-milled soft wheat makes incredible sourdough bread. Once you know how it likes to be handled, it produces beautiful, flavourful loaves.

Explore more fresh-milled soft wheat sourdough recipes:

Why You’ll Love This Recipe

  • Not Your Typical Whole Wheat Bun » Soft, fluffy, and full of flavor, these buns don’t taste or feel like what most people expect from whole wheat.
  • Passes the Squish Test » Light, plush, and wonderfully resilient, they’re soft enough to gently squish around your burger, yet springy enough to bounce right back.
    Bonus: They toast beautifully crisp on the outside without sacrificing their soft interior.
  • Deeply Flavorful » Freshly-milled soft wheat adds deliciously complex, wheaty flavors that complement your fillings instead of disappearing behind them.
  • Forgiving Schedule » Tangzhong and a touch of butter slow fermentation, giving you a generous window and making these buns easy to fit into your day.

What to Expect From This Dough

This dough will behave differently from what you’re used to.

It will feel surprisingly dry at the beginning. Almost like it’s not going to come together. That’s expected.

After a short rest to fully hydrate the flour, you’ll knead in fridge-cold butter. That’s when the dough transforms: it becomes soft, pliable, and cohesive. It will still feel firm and a little tacky. That’s exactly where we want it.

This dough rises slowly, so don’t keep checking on it. It may seem like nothing is happening after a couple of hours, but patience pays off.

Once bulk fermentation is complete, you’ll see the shift: the dough will be tall and puffy, forming a well-rounded dome. It may double in size or even more. That slow, steady rise while maintaining structure is its quiet superpower.

Why Soft Wheat?

or: why I don’t just swap in fresh-milled hard wheat.

Classic American hamburger buns are usually made with refined white hard wheat flours (or a mix) such as all-purpose or bread flour. Their higher gluten strength allows them to trap gas efficiently and create a light, airy structure. They also bind and retain water easily, which keeps the crumb soft after baking.

So why do I choose to use fresh-milled soft wheat instead?
Most importantly, it’s the only wheat I have access to in my part of the world. But that’s not a problem at all.

Fresh-milled hard wheat behaves differently from refined bread flour. Its sharper, tougher bran can interfere with gluten development, and its ability to bind a lot of water can sometimes contribute to a heavier crumb.

Soft wheat, as the name suggests, has a softer, finer bran with slightly smoother edges. It naturally produces a more tender crumb. However, it also has less gluten strength and binds less water, so it benefits from a different approach:

Instead of relying on high hydration in the dough itself, overall hydration is kept lower. All of the milk and water is cooked with part of the flour into a thick, pudding-like tangzhong. This gelatinised starch mixture holds moisture without overloading soft wheat’s more fragile gluten structure.

The result is a soft, springy bun with excellent structure: light, resilient, and still soft for days after baking.

And honestly: I don’t feel like I’m missing out. Soft wheat has its own strengths, and both wheats can make amazing buns when you play by their rules.

Tools You May Need

Grain Mill (optional): Mill your own flour for best flavor and nutrition (or choose a store bought alternative).

Digital Kitchen Scale: Weighing ingredients is the most reliable way to make bread.

Small Pot & Whisk: To cook the tangzhong roux.

Stand Mixer (optional): You can also knead the dough by hand, but it’s not my favorite here.

Bench Scraper (optional): To divide the dough into roughly equal buns.

Rolling Pin: To flatten and spread the buns before proofing.

Ingredients & Substitutions

Fresh-Milled Soft Wheat Flour
I prefer soft wheat for tender buns like these, milled on the finest setting of your grain mill.
If you don’t mill your own flour at home, any high-quality whole wheat flour in Europe will work.
In the U.S., a whole wheat pastry flour with at least 10% protein is the closest match.

Butter
I prefer enriching with butter for best flavor. For dairy-free buns, you can swap a high-quality vegan block butter without compromising the texture.

Milk
Use whole milk, or a whole milk-style plant milk for dairy-free buns. Soy milk performs most similarly in baking.

Eggs
One egg, split between dough and egg wash, is all we need.
I’ve had some luck replacing eggs with extra soy milk for vegan doughs, though I haven’t tested it in this recipe yet.

Sugar
The sugar serves as food for the sourdough starter and helps prevent sourness during a long bulk. The buns won’t be sweet once baked. You can reduce it if you mind your sugar intake, but the buns will taste more sour if you skip it entirely.

Sourdough Starter
Use active, bubbly starter that’s been fed within the last 4–8 hours. If you keep your starter in the fridge, cold starter that’s been fed within the last 7 days works fine.

Sesame Seeds
Use hulled or unhulled sesame seeds, to lightly sprinkle on top of the buns after egg washing.
I also love adding a few nigella seeds as well (they pack a punch, so add sparingly).

Baking Schedule

One of my favorite things about this dough is the leisurely pace of fermentation. If you don’t live by the clock (like me) and miss shaping by just a little, you’ll still be rewarded with beautifully soft, golden buns.

Here’s what a typical timeline looks like:

  • Bulk fermentation: 8–10 hours (or overnight)
  • Proofing: 1–2 hours, until round and puffy
  • Baking: around 15 minutes, until golden

There are a couple of easy ways to fit these into your schedule:

  • Overnight: Mix the dough in the evening, let it bulk ferment overnight, then shape, proof, and bake in the morning. Perfect for burgers at lunch or a leisurely holiday cookout.
  • Same day: Mix in the morning, let the dough bulk ferment throughout the day, then bake fresh buns for dinner.

How to Make Fresh-Milled Sourdough Hamburger Buns (Step-by-Step)

Step 01

Mill Grains

A stainless steel stand mixer bowl sitting underneath the chute of a wooden home grain bowl, catching fresh milled flour.

Weigh out 450g of whole soft wheat berries and grind them on the finest setting of your grain mill. Separate 50g of freshly milled flour and set aside.

Step 02

Cook the Roux (Tangzhong)

Tangzhong roux cooked until thick and pudding-like, with a whisk leaving a visible trail through the mixture.

In a small pot, combine milk, water, salt, and 50g of freshly milled flour, and whisk to combine. Cook over medium low heat, stirring often, until thickened to a pudding-like consistency.
Let the mixture cool down to below 42°C (107°F). It should feel neutral to the touch.

Step 03

Mix & Rest (Fermentolyse)

Dry, shaggy burger bun dough after premixing in the bowl of a stand mixer before the resting period.

In a large bowl (or the bowl of a stand mixer), combine the remaining freshly milled flour, sugar, egg and sourdough starter. Add the cooled tangzhong and mix into a dry, shaggy dough.
Cover and let rest for 30 minutes.

Step 04

Knead & Bulk Ferment

The dough after kneading, now soft, cohesive, and draped over the dough hook in a stand mixer.

Knead the dough for 2–3 minutes using a stand mixer (or by hand).
Add the cold butter cubes, one by one, and keep kneading for another 7–8 minutes, until the dough becomes smooth and pliable.
Shape into a soft, slightly tacky ball, cover, and let ferment at room temperature for 8–10 hours or overnight, until puffy and well risen.

Step 05

Divide & Shape

Soft burger bun dough divided into eight equal wedges, with four pieces already folded into rough dough balls for shaping.

When the dough is domed and airy, sprinkle it with a bit of flour, and turn it out onto a clean work surface. Divide into 8 equal portions.
Gently roll up each piece just enough to smooth it out, then shape into tight balls. Use a rolling pin to gently flatten the buns.

Step 06

Proof Buns

Shaped burger buns gently flattened on a parchment-lined baking sheet before proofing.

Place shaped buns on a parchment-lined baking sheet and cover with plastic wrap. Let rise at room temperature for 1–2 hours, until noticeably puffy and soft to the touch.

Step 07

Egg Wash

Puffy, fully proofed burger buns brushed with egg wash and sprinkled with white sesame and nigella seeds before baking.

Once the buns are fully risen, preheat the oven to 220°C (430°F). Beat the egg white with 1 tablespoon of milk and brush the buns evenly. Sprinkle with sesame and nigella seeds (if using).

Step 08

Bake & Cool

Golden freshly milled sourdough hamburger buns with shiny, egg-washed tops cooling on a parchment-lined baking tray.

Bake for 15–18 minutes, until turning golden.
Let the buns cool on the baking sheet set over a wire rack. Serve slightly warm or cool to room temperature.

Tips & Troubleshooting

Tangzhong

  • The tangzhong can be prepared in advance and stored in the fridge, well covered, until needed.
  • Stop cooking the tangzhong as soon as it begins to bubble like mud, and the surface holds a visible trail from your whisk. It continues to thicken as it cools.
  • To speed up cooling, run the outside of the pot under cold water or place it in a bowl of ice water.
  • If you end up with less than 300 g of tangzhong, a little too much liquid has evaporated during cooking. Simply add enough water to bring it back to the correct weight.

Fermentation

  • Fermentation times will vary depending on room temperature and the strength of your starter.
  • Proofing is complete when the buns are noticeably puffy and feel light and plush when gently touched.
  • Let the buns proof fully. A generous final rise is one of the keys to their soft, squishy texture.

Shaping & Baking

  • Roll each dough ball into a flat-ish disc before proofing. They should almost look like English muffins. These buns don’t spread much during proofing or baking, so you’ll have to roll them to the diameter you want now.
  • Don’t worry if they look a little flat after shaping. During proofing they’ll rise into beautifully rounded domes again.
  • If you’re using an instant read thermometer, the buns are fully baked when the center reaches 88°C/190°F.
Freshly milled sourdough hamburger buns with golden, shiny tops cooling on a parchment-lined baking tray.
Freshly milled sourdough hamburger buns with golden, shiny tops cooling on a parchment-lined baking tray.

How to Serve Fresh-Milled Sourdough Hamburger Buns

These are as delicious served plain, soft and squishy as they are toasted. They’re sturdy enough for generously filled burgers, yet soft enough to enjoy with nothing more than a little butter.

They’re perfect for:

  • Classic Burgers » Layer them with your favorite burger toppings, from crisp lettuce and juicy tomatoes to cheese, pickles, onions, and your favorite patty.
  • Breakfast Sandwiches » Fill them with fried or scrambled eggs, cheese, avocado, or bacon for an indulgent breakfast.
  • Sloppy Joes & Pulled Jackfruit/Pork » Their sturdy yet tender crumb holds saucy fillings beautifully.
  • Picky Eaters » They love toasted buns spread with nothing but ketchup (at least mine does).

How to Store & Freeze

  • Room Temperature:
    Store cooled buns in an airtight container or wrapped in a freezer bag for up to 3–4 days. They’ll stay soft and tender.
  • Freezing:
    Place in a freezer bag, either sliced or whole, separated with a piece of parchment paper. They’ll keep well for 2–3 months.
  • Thawing & Refreshing:
    Thaw at room temperature for 1–2 hours (or overnight). To refresh them, warm gently in a low oven for 5–10 minutes, or microwave in 10–15 second bursts to bring back their softness.

Recipe FAQs

Yes. If you don’t mill your own flour at home, you can still make deliciously soft whole wheat burger buns.
With store-bought flour, you can skip the resting step (fermentolyse) if you like. In my experience, it only makes a noticeable difference to fresh-milled buns.
Here are some suitable store-bought flour alternatives.

Yes. Replace the active starter with the same amount of sourdough discard, then add 1 sachet (7g) of instant yeast after the rest period.
Knead for about 2 minutes to incorporate the yeast before adding the fridge-cold butter.

Let the dough rest for 45 minutes, then shape and proof for 30 minutes, or until the buns are visibly puffy and soft to the touch. Egg wash and bake as written.

You can, but the crumb may be slightly tighter.
The water content in cold butter turns to steam during baking, providing a little more lift and a lighter texture. Oil will still produce soft buns, but they may not quite as much.
(I haven’t tested this recipe with oil myself yet.)

These buns should stay soft for several days when stored airtight. If they lose a little of their bounce, a quick refresh can bring them back.
Microwave them on low in 10–15 second bursts until soft and warm again.

If you make these fresh-milled sourdough hamburger buns…

I’d love to hear how they turned out! Did you enjoy the squish?

P.S. If you enjoy super soft buns, you might love these recipes too:

happy baking!

Soft & Squishy Sourdough Burger Buns with Fresh-Milled Flour

Soft, squishy sourdough hamburger buns made with freshly milled soft wheat flour. Tangzhong keeps them light and tender, while fresh flour adds incredible flavor.
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Freshly milled sourdough hamburger bun filled with a generously stacked burger, topped with sesame seeds and served on a marble board.
5 from 1 vote
Prep Time:45 minutes
Cook Time:15 minutes
Bulk & Proofing Time:10 hours
Total Time:11 hours
Servings:8 buns
Calories:300kcal
Equipment
  • grain mill - (optional, you can also pick a store-bought whole wheat alternatve)
  • digital kitchen scales
  • stand mixer or hand mixer - (optional, you can knead by hand as well)
  • bench scraper
  • rolling pin
Ingredients

Tangzhong Ingredients

  • 125 g milk - (½ cup)
  • 125 g water - (½ cup)
  • 50 g freshly milled soft wheat flour - See Ingredients for store-bought flour alternatives.
  • 10 g salt - (1¾ tsp)

Dough Ingredients

  • 300 g tangzhong paste - cooled to below 42°C/107°F
  • 400 g freshly milled soft wheat flour - See Ingredients for store-bought flour alternatives.
  • 25 g sugar - (2 tbsp)
  • 1 large egg yolk
  • 120 g sourdough starter, active and bubbly - (generous ½ cup)
  • 60 g cold, cubed butter - (¼ cup) ADD AFTER FERMENTOLYSE

Egg Wash

  • 1 large egg white
  • 1 tbsp milk
  • sesame seeds - hulled or unhulled, black or white
  • nigella seeds - optional but delicious
Instructions

Mill Grains

  • Weigh out 450g whole soft wheat berries and grind them on the finest setting of your grain mill. Set aside 50g of the freshly milled flour for the tangzhong.

Cook the Roux (Tangzhong)

  • Combine the milk, water, and salt in a small pot. Whisk in the reserved 50g of flour and cook, stirring frequently, until thickened to a pudding-like consistency.
  • Once it begins to bubble, pull it off the heat. Cover the mixture and let it cool down to below 42°C (107°F). It should feel neutral to the touch.

Mix & Rest (Fermentolyse)

  • In a large bowl (or the bowl of a stand mixer), combine the remaining freshly milled flour, sugar, egg yolk, and sourdough starter. Add the cooled tangzhong and mix into a dry, shaggy dough.
    Cover and let rest for 30 minutes.

Knead & Bulk Ferment

  • Knead the dough for 1-2 minutes using a stand mixer (or by hand).
  • With the mixer running, add the cold butter cubes, one by one. Knead for another 8 minutes, until the dough is smooth and pliable, and clears the sides of the stand mixer bowl.
  • Shape into a soft, slightly tacky ball, cover, and let ferment at room temperature for 8-10 hours (or overnight), until puffy and well risen.

Shape Buns

  • Line a baking sheet with parchment paper.
  • When the dough is domed and puffy, sprinkle it with a little flour and turn it out onto a clean work surface. Divide into 8 equal portions.
  • Gently roll up each piece just enough to smooth it out, then shape into tight balls. Use a rolling pin to gently flatten the buns. Place on a parchment-lined baking sheet.

Proof

  • Cover the buns with plastic wrap and let rise at room temperature for 1–2 hours, until almost doubled, puffy and soft to the touch. Toward the end of proofing, preheat the oven to 220°C (428°F).

Bake & Cool

  • Beat the egg white with 1 tablespoon of milk and brush the surface of the buns evenly. Lightly sprinkle with sesame seeds and nigella seeds (if using).
  • Bake for 15–18 minutes, or until turning golden.
  • Set the baking sheet on a wire rack and let the buns cool completely.
Notes
  1. If you’re not milling at home, choose any whole wheat flour from a European supermarket. In North America, a whole wheat pastry flour with a protein content of at least 10% is the closest match.
  2. Store any leftover buns in an airtight container at room temperature for up to 2–3 days. They also freeze beautifully.
  3. The tangzhong can be prepared in advance and stored in the fridge, well covered, until needed.
  4. If you end up with less than 300 g of tangzhong, a little too much liquid has evaporated during cooking. Simply add enough water to bring it back to the correct weight.
  5. Fermentation times will vary depending on room temperature and the strength of your starter
  6. These buns don’t spread much during proofing or baking, so you’ll have to roll them to the diameter you want. Don’t worry if they look a little flat after shaping. During proofing they’ll rise into beautifully rounded domes again.
  7. Let the buns proof fully. A generous final rise is one of the keys to their soft, squishy texture.
  8. If you’re using an instant read thermometer, the buns are fully baked when the center reaches 88°C/190°F.
     
Author: Sarah | Grains & Greens Kitchen
Serving: 1bun | Calories: 300kcal | Carbohydrates: 52g | Protein: 8g | Fat: 8g
Tried this recipe?Let me know how it turned out!
Soft & squishy sourdough hamburger buns made with freshly milled soft wheat and tangzhong. These flavorful homemade buns have a tender crumb, toast beautifully, and pass the squish test!

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5 from 1 vote

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Recipe Rating




3 Comments

  1. 5 stars
    Thank you for a great HB recipe and full details! Much appreciated – I made a different recipe over the 4th holiday, and they were more like rolls, not buns. We were disappointed – STILL USED THEM BUT NOT FOR BURGERS. I did use the soft white wheat berries, sifted half the bran/germ out (kept in freezer for future use). LOVE the info on – it will seem dry – leave it alone – and let it rise – takes time. I look forward to trying your recipe with the tangzhong method. Love your recipes, details and vids. Thanks again, blessings – Angie

    Reply

    1. Hi Angie,
      I’m so glad you found the info section useful! I always worry about posts getting too long, so your comment really made me smile. 😊
      Do let me know how your buns turn out when you’ve had a chance to make them.
      Cheers,
      Sarah

      Reply

  2. I made these with half freshly milled wheat and half white flour. The result were soft and squishy buns. I made them for eight people and all of them liked them, even the picky eater!
    I will definitely make these again. One thing I will have to remember is that fermentation does take some time. I only got away with a relatively short time because of the high temperatures. The instructions were easy to follow and it worked just as described.

    Reply