Baking Great Bread at HomeTrue laminated crescents, leavened with your starter
AdvancedSourdoughCroissants
by Henry Hunter
The French croissant, the sourdough way
Fermentation
Levain 8-12 hours, then two cold rests of 10-16 hours each
Bake Time
18-22 minutes
Yield
Makes 12 large sourdough croissants
Perfection is not required
"Perfection is not required. Progress is."— Henry Hunter
By Henry Hunter Jr., founder of Crust & Crumb Academy and Baking Great Bread at Home.
Authentic Flavor
If you've got a healthy starter and a little patience, real sourdough croissants are within reach. Same butter block and three folds as the classic. The levain just makes it slower, and the tang is your reward. Keep it cool, wait for the proof, and trust your starter the way you've learned to on every loaf. First batch won't be perfect. That's not the goal. Progress is.
Equipment Needed
Lamination is a precision craft. Volume measurements won't get you there.
Optional but recommended for the détrempe. Hand-mixing works if you're patient.
A heavy French rolling pin makes lamination far easier than a short pin.
You'll be rolling to specific dimensions. Eyeballing it costs you layers.
For trimming clean edges and lifting cold dough off the counter.
For cutting clean triangles without dragging the layers.
For applying egg wash gently without crushing the proofed layers.
For proofing and baking 12 croissants comfortably spaced.
For wrapping the dough tightly between folds.
Ingredients
The Levain
Build this the day before so it's ripe when you mix the dough. It replaces the commercial yeast entirely.
Détrempe (The Dough)
The enriched dough that will encase the butter. Mixed cool so the levain works slowly. The 40g of butter here is separate from the lamination block.
Beurrage (Butter Block)
The butter that builds your layers. High fat, European style. Same block as the classic French version.
Egg Wash
One wash, brushed on right before baking for color and shine.
Pro Tip
Plan the calendar first. For the Saturday bake-along, here's your clock: build your levain Thursday morning, mix the dough Thursday night, laminate Friday, shape and bake Saturday. Your starter has to be strong for these, since there's no commercial yeast backing it up. Feed it for a day or two beforehand until it reliably doubles or triples within 4 to 6 hours of a feeding. A sluggish starter gives you dense, tight croissants no amount of extra proofing fully fixes. And buy the best European butter you can afford. Higher fat means cleaner layers and less leakage.
Day 1 — Morning
Build the Levain
This is your engine, the same you build for any sourdough bake, just feeding croissant dough this time. Build it 8 to 12 hours before you mix the dough.
Click each step to mark complete
Mix the levain
Combine the ripe starter, bread flour, and room-temperature water in a jar. Stir smooth, cover loosely, and leave at warm room temperature, around 75 to 78F (24 to 26C).
Wait for ripe and bubbly
Let it ferment 8 to 12 hours until doubled, domed, and bubbly, with a pleasant tang. A float test confirms it: a small spoonful should float in water. You need 100g for the dough. The little bit left over feeds your jar.
⏱ Wait Time
8-12 hours
Pro Tip
For a Saturday bake, build the levain Thursday morning and mix the dough Thursday night, so the levain peaks right when you need it.
Precise Timers
Use these interactive timers to track your stages.
Levain Ferment
Day 1 — Evening
Make the Détrempe
The base dough. We mix it cool and barely develop it. The folding does the real gluten work later. Sourdough takes longer to come together than a yeasted dough, so give it time.
Click each step to mark complete
Combine the ingredients
In a stand mixer with the dough hook, combine the bread flour, sugar, salt, ripe levain, cold milk, cold water, and softened butter. Mix on low 3 minutes to combine, then medium-low 5 to 7 minutes until smooth and pulling cleanly from the bowl. It should feel soft and pliable, not stiff. Don't overmix. Overdeveloped dough fights you during .
Shape into a rectangle
Turn the dough out and pat it into a flat rectangle roughly 8 x 6 inches. Wrap tightly in plastic.
Overnight cold rest
Refrigerate 10 to 16 hours. By morning the dough should look slightly puffed and relaxed, not ballooned. If your starter is strong, lean toward the shorter end. This is a sourdough, so unlike a yeasted dough it keeps fermenting slowly in the cold, and a dough that goes too far turns slack and loses its layers.
⏱ Wait Time
10-16 hours
Pro Tip
Keep this dough cooler than a normal sourdough loaf. You're protecting the butter you'll add tomorrow, and a cold, relaxed dough is a forgiving dough. Strong starter? Set an alarm for the 10-hour mark and check it.
Cool protects the butter
A normal sourdough loaf likes a warm bulk. Croissants can't have it. Warm dough means soft butter, and soft butter means no layers. So you ferment cooler and let the fridge do most of the work overnight.
The real risk is over-fermentation, not butter
Most people fear the butter, but the quiet killer is a dough that ferments too long and goes slack. A slack dough can't hold its layers or its rise. That's why the cold rests here are capped at 16 hours and why you read the dough instead of just the clock.
The Takeaway
Cooler and slower than a loaf, but don't let it run away from you. Puffed and relaxed, not ballooned.
Precise Timers
Use these interactive timers to track your stages.
Initial Mix
Day 2 — Morning
Build the Butter Block (Beurrage)
Turn the cold butter into a flat, even slab the same firmness as your dough. This is the heart of the croissant.
Click each step to mark complete
Pound the butter
Slice the cold butter into pieces and arrange them into a square on parchment. Cover with a second sheet. Pound firmly with the rolling pin, then roll into a 7 x 7 inch square about ½ inch thick.
Trim and chill
Trim the edges clean, set the trimmings back in the center, and roll smooth. Wrap and refrigerate at least 30 minutes. Target temp is 55 to 60F (13 to 16C): it should bend without cracking.
⏱ Wait Time
30 minutes
Pro Tip
This is the babka butter rule again. Cold butter holds its layers, warm butter melts in and vanishes. Get the butter and dough to the same cool, bendable feel and lamination gets easy.
Precise Timers
Use these interactive timers to track your stages.
Chill Butter Block
Day 2 — Morning
Lock In the Butter
The dough and butter become one laminated package. Both should feel similar in firmness. Neat corners here pay off in every layer later.
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Roll out the dough
Roll the chilled détrempe into a 10 x 10 inch square with even thickness and square corners.
Position the butter
Place the butter block diagonally in the center so it sits like a diamond inside the square.
Fold over the butter
Fold the dough corners inward to completely enclose the butter. Pinch all seams firmly. No butter should show. If it peeks through, dust lightly with flour and chill before continuing.
Pro Tip
If the dough warms up or fights you, stop and chill it 15 to 20 minutes. Sourdough dough is a little more extensible than yeasted, but the butter still hates heat.
Cool everything you can
Chill your rolling surface with a sheet pan of ice for a few minutes, then dry it. Chill your rolling pin in the fridge. A cool surface and cool tools buy you precious extra minutes before the butter softens.
Work in short bursts
Roll, fold, and get the dough back in the fridge fast. The moment the butter starts to feel greasy or smear, stop and chill for 20 to 30 minutes. There's no penalty for extra chilling, and sourdough dough is softer than yeasted, so it needs the help.
The Takeaway
Warm kitchen plus soft sourdough dough is where beginners lose the butter. Stay cold, move fast, chill often.
Day 2 — Morning
First Letter Fold
This is where the layers begin. Three letter folds produce 27 alternating butter layers, the same stack, fold, roll motion from the zebra bake.
Click each step to mark complete
Roll into a rectangle
Roll the package to roughly 8 x 24 inches, 4 to 5mm thick. Roll firmly but evenly, lengthwise. Brush off excess flour.
Execute the fold
Fold the bottom third up, then the top third down over it, like a business letter. That's your first fold.
Chill
Wrap tightly and refrigerate 60 minutes.
⏱ Wait Time
60 minutes
Pro Tip
If butter ever cracks through, dust the spot with flour and keep going. A little breakthrough is normal.
Precise Timers
Use these interactive timers to track your stages.
Chill After Fold 1
Day 2 — Late Morning
Second Letter Fold
Rotate the dough 90 degrees so the folded edges sit left and right like a book, then roll and fold again.
Click each step to mark complete
Roll and fold again
Rotate 90 degrees. Roll again to 8 x 24 inches, 4 to 5mm thick, and execute another letter fold.
Chill
Wrap tightly and refrigerate 60 minutes.
⏱ Wait Time
60 minutes
Pro Tip
Always rotate a quarter turn before each roll, so the open edge is on your right. That keeps you rolling across the layers, never sealing them shut.
Precise Timers
Use these interactive timers to track your stages.
Chill After Fold 2
Day 2 — Afternoon to overnight
Third Letter Fold, Then Overnight Rest
One final fold brings you to 27 layers, then a cold rest relaxes the gluten, firms the butter, and deepens the sourdough flavor.
Click each step to mark complete
Roll, fold, wrap
Rotate 90 degrees, roll to 8 x 24 inches, and execute the third letter fold. You now have 27 butter layers.
Overnight rest
Wrap tightly and refrigerate 10 to 16 hours. The dough should relax and puff slightly, not balloon. Strong starter, lean to the shorter end. This final rest relaxes the gluten, firms the butter, builds flavor, and makes shaping easier.
⏱ Wait Time
10-16 hours
Pro Tip
Longer within that 10-to-16-hour window means more tang. Shorter keeps it milder. Past 16 hours you risk a slack dough that won't hold its layers.
Each fold triples the layers
First fold gives 3 layers, second gives 9, third gives 27. Rolled and shaped, those become the honeycomb crumb.
More folds aren't better
Four folds create thinner, Danish-style layers. Three folds give the open honeycomb that defines a classic croissant.
The Takeaway
Three folds. Twenty-seven layers. Perfect honeycomb.
Day 3 — Morning
Roll, Cut, and Shape
The dough should feel cold and firm. Work quickly so the butter stays cool. Measure rather than eyeball, because lamination mistakes show up loud once baked.
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Roll final thickness
Roll into a long rectangle, about 8 x 20 inches, 4 to 5mm thick. Keep the edges square. Let it rest a couple minutes if it resists.
Cut triangles
Trim the edges clean. Mark 4-inch intervals along the long edge and cut long triangles with a 4-inch base and 8-inch height. You'll get about 12.
Stretch and notch
Gently stretch each triangle slightly longer. Cut a ½-inch notch in the center of the base. The notch helps the classic crescent curl.
Roll the croissants
Pull the base corners outward slightly, then roll from base to tip with gentle, even tension. Place tip-side down on parchment-lined pans so they can't unroll.
Pro Tip
Light contact, not pressure. Crushing the layers seals them shut and kills the rise. And if it's your first batch, shape all twelve but freeze half before they proof. Bake six fresh now, stash six for another morning. No pressure to nail a full dozen at once.
Shaping
Shaping Croissants
All from one sheet of laminated dough. Clean triangles, light even tension.
Classic Crescent
The traditional curved shape.
RecommendedClick each step to mark complete
Notch the base
Cut a ½-inch slit in the center of the triangle's wide base.
Stretch and roll
Stretch slightly longer, then roll base to tip with light tension, tip underneath.
Curve the ends
Bend the two ends toward each other into a crescent.
Straight (Modern Bakery Style)
Leave it straight rather than curving the ends. The look most modern bakeries use for all-butter croissants.
Click each step to mark complete
Roll without curving
Roll the same way but keep the croissant straight.
Pain au Chocolat
Cut rectangles instead of triangles.
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Cut rectangles
Cut the sheet into rectangles roughly 3 x 5 inches.
Add chocolate and roll
Lay a chocolate baton near one short edge, fold over, add a second, and roll to enclose. Seam-side down.
Proof Test: Ready croissants look puffy, show separated layers along the cut sides, and jiggle like jello when you nudge the pan. Sourdough takes longer to get there, so be patient.
Day 3 — Morning to afternoon
Final Proof
Sourdough croissants proof longer than yeasted ones because there's no commercial yeast pushing them. This is the step that decides whether your butter stays put. Don't rush it.
Click each step to mark complete
Proof, loosely covered
Cover the shaped croissants loosely so they don't dry out, and proof at 75 to 78F (24 to 26C) for 3 to 5 hours. That's longer than yeasted croissants. With sourdough it can run past that if your starter or kitchen is cool. Read the croissant, not the clock.
The jiggle test
They're ready when noticeably larger, visibly layered along the cut sides, and they wobble softly like jello when you nudge the pan. If they feel dense or tight, give them more time.
⏱ Wait Time
3-5 hours
Pro Tip
Do not proof above 78F (26C). Butter melts long before the dough structure sets, and once it melts into the dough the layers are already compromised.
No commercial yeast safety net
Sourdough croissants lean entirely on wild yeast, which works slower. A 2-hour proof for yeasted croissants may need 4 or 5 hours here. That's normal, and the flavor is the reward.
Underproofing leaks butter
Just like the yeasted version, butter pooling on the pan almost always means underproofing. The structure wasn't ready to trap the steam, so the butter ran. A full, jiggly proof prevents it.
The Takeaway
Slower is the deal you made with sourdough. Wait for jiggly, every time.
Precise Timers
Use these interactive timers to track your stages.
Final Proof
Day 3 — Bake
Bake to Mahogany
As they bake, water in the butter turns to steam and separates the layers. A hot oven and a single egg wash give you the deep golden shine.
Step by Step
Preheat
Preheat the oven to 400F (205C) with the rack in the center position, a full 30 minutes ahead.
Egg wash
Whisk the egg with the milk. Using a soft pastry brush, gently paint only the top of each proofed croissant, going with the grain of the layers. Keep the brush off the exposed cut sides — hitting those layers glues them shut and kills the rise.
Bake
Bake 18 to 22 minutes, rotating halfway through. They should be deeply golden, almost mahogany at the high points, and visibly layered along the sides. A pale croissant is an underbaked croissant.
Cool
Cool on a rack at least 15 to 20 minutes. The interior is still setting. Cutting too early gives you a doughy center.
Preheat
Bake
Cool
Bake one tray at a time if your oven runs uneven. And a word for your first batch: if the honeycomb isn't picture-perfect, you still made real sourdough croissants, and they'll still taste like something worth the wait. Clean, even layers come with reps, not on day one.
Baking Methods
Center rack, one tray at a time for even browning.
Equipment: Sheet pan with parchment
Preheat
Preheat to 400F (205C), center rack, for a full 30 minutes.
Egg wash
With a soft pastry brush, paint a single light coat across only the tops, going with the grain of the layers and avoiding the exposed cut sides.
Bake
Bake 18 to 22 minutes, rotating halfway, until deep golden and almost mahogany at the high points.
Cool
Cool on a wire rack at least 15 to 20 minutes before eating.
"A few small butter spots on the pan are normal. Large pools mean underproofing, weak lamination, or butter that got too warm during rolling."
Nutrition Facts
Per 1 croissant • 12 servings per recipe
* Values are estimates based on standard ingredients; actual values vary by brands and portion size.
Storage
Room Temperature
Best the day they're baked. Up to 24 hours in a paper bag, though they soften fast.
Refrigerated
Up to 5 days tightly wrapped. Bring to room temperature or warm briefly before serving.
Frozen
Freeze after shaping (before proofing) or after baking. Up to 1 month.
Refresh
Reheat at 350F (175C) for 5 to 7 minutes. Never microwave, it destroys the crisp layers.
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Troubleshooting
Baker's Notes
Common questions and solutions for perfect results
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Wire Monkey Handcrafted Bread Lames
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