Sourdough Brioche: Buttery, Rich, and Naturally Leavened

Sourdough brioche is one of the most rewarding bakes — a rich, buttery, naturally leavened bread that beats any commercial version. The trick is patience: enriched doughs ferment slower, and brioche needs cold time to develop properly.

The recipe

For one large brioche or 12 buns:

• 500g bread flour
• 250g whole milk (warm)
• 120g sourdough starter (very active)
• 60g sugar
• 10g salt
• 3 large eggs (room temperature)
• 200g unsalted butter, softened (40% butter — true French brioche)

Method

Build a strong levain

The night before, build a stiff levain: 30g starter + 80g flour + 40g water. This needs to be vigorously active before you use it.

Mix

In a stand mixer with paddle:

• Combine milk, starter, sugar, eggs
• Add flour and salt
• Mix 5 minutes on low

Knead

Switch to dough hook. Knead 8 minutes on medium until smooth.

Add butter slowly

With the mixer running on low, add the softened butter one tablespoon at a time. Wait until each addition is incorporated before adding the next.

This step takes 10–15 minutes total. The dough goes through stages: shaggy, broken, smooth, glossy.

Develop fully

Once all butter is in, mix on medium for 5 more minutes. The dough should be smooth, glossy, and clear the sides of the bowl.

Bulk ferment

Cover and rest 4 hours at room temperature, then 12–18 hours in the fridge. The cold time is essential for handling and flavor.

Shape

Pull the dough straight from the fridge — it shapes much better cold.

For a brioche loaf: divide into 4–6 pieces, round each, place in a buttered 9×5 loaf pan.

For brioche buns: divide into 12 equal pieces (~90g each), round, place on parchment-lined sheet.

Final proof

4–6 hours at room temperature until visibly puffed and the dough barely holds an indent when poked.

Egg wash

Mix 1 egg with 1 tbsp milk. Brush gently over the surface.

Bake

• Loaf: 350°F for 35–40 minutes
• Buns: 375°F for 18–22 minutes

Internal temperature should reach 195°F. The crust should be deep golden brown.

The butter is the point

Don't skimp on butter. 40% by flour weight is what makes brioche brioche. Less butter = a rich bread, not actual brioche.

Use European-style butter (higher fat) if you can. The flavor difference is real.

Common mistakes

Brioche didn't rise — starter wasn't strong enough. Build a stiff levain and verify it doubles before using.

Greasy texture — butter was too soft (melted) when added, or kitchen too warm during mixing.

Tough crumb — under-mixed, or under-proofed.

Dense, oily — over-proofed, or butter incorporated too fast.

Variations

• Brioche feuilletée — laminate butter into the dough like puff pastry. Buttery, flaky layers.
• Chocolate brioche — knead 100g chocolate chips into final dough
• Brioche burger buns — divide as buns, top with sesame seeds before baking
• Brioche French toast bread — bake in a Pullman pan for sliceable French toast loaves

Why sourdough brioche keeps better

Standard brioche is best within 48 hours. Sourdough brioche stays soft and flavorful for 5+ days. The acidity slows staling.

Storage: room temperature in an airtight container, or freeze for 2 months.

What to do with great brioche

• French toast (the best French toast)
• Burger buns (instant restaurant-quality)
• Bread pudding
• Croque monsieur
• Toast with jam (the underrated version)
• Trifles and other dessert applications

A weekend schedule

Friday evening

• Build stiff levain
• Refrigerate after 4 hours

Saturday morning

• Mix dough
• Add butter slowly (this takes time)
• Bulk 4 hours warm
• Refrigerate overnight

Sunday morning

• Pull from fridge
• Shape
• Final proof 4–6 hours
• Bake afternoon
• Serve warm

It's a 36-hour project, but only 30 minutes of active work.

Why it's worth the time

A bakery brioche loaf is $12. Homemade sourdough brioche is $4 in ingredients and several orders of magnitude better. The first time you make French toast with your own brioche, you'll understand why bakeries charge what they do.