Classic French Butter Croissant with 27 Flaky Layers Step-by-step instructions

Before you start

Before starting, ensure all ingredients are measured and chilled. The butter should be cold but not rock-hard; if it is too firm, let it sit at room temperature for 10 minutes. Prepare a clean, cool work surface and have a rolling pin, bench scraper, and plastic wrap ready.

It is helpful to have an instant-read thermometer to check the dough and proofing temperatures. The détrempe can be made a day ahead and refrigerated overnight, which improves its handling. The butter block can also be prepared in advance and kept refrigerated.

Instructions

Building the Dough

1. 1Make the détrempe
   In a stand mixer fitted with the dough hook, combine the flour, salt, sugar, and yeast. Add the cold water and mix on low speed until a shaggy dough forms, about 2 minutes. Increase speed to medium and knead until the dough is smooth and elastic, about 5 minutes. The dough should be firm but not sticky. Shape into a rectangle, wrap in plastic wrap, and refrigerate for at least 30 minutes.
   Look for Dough is smooth, elastic, and cold; it holds a rectangle shape without springing back.
   Tip Keep everything cold; the dough and butter must be the same firmness for clean lamination.
2. 2Prepare the butter block
   Place the chilled French cultured butter between two sheets of plastic wrap. Using a rolling pin, beat and roll the butter into a 7-inch square, about 1/2 inch thick. Keep the butter cold but pliable. If it cracks, let it sit at room temperature for a few minutes, then roll again. Wrap and refrigerate until firm but still flexible.
   Look for Butter block is a neat square, about 7 inches, with no cracks or air pockets.
   Tip If the butter is too hard, it will break through the dough; if too soft, it will ooze out. Aim for a cool, pliable texture.

At the end of this phase, you have a smooth, cold détrempe and a neat, pliable butter block. The détrempe should be firm but not stiff, and the butter should be a perfect square, free of cracks. The dough is now ready for lamination. If the dough has warmed or the butter has softened, chill both briefly before proceeding. This phase is the foundation; a well-made détrempe and butter block ensure clean, even layers later.

Laminating the Layers

3. 3Lock in the butter
   On a lightly floured surface, roll the chilled détrempe into a 10-by-14-inch rectangle. Place the butter block in the center, covering the middle third of the dough. Fold the left third over the butter, then the right third over that, enclosing the butter completely. Press the edges to seal. This is the first lock-in.
   Look for Butter is fully enclosed; the dough packet is neat and sealed at the seams.
   Tip Work quickly and keep the dough cold. If the butter softens, chill the packet for 15 minutes before rolling.
4. 4First double turn
   Roll the dough packet into a long rectangle, about 8 by 24 inches, keeping the edges straight. Fold the top third down to the center and the bottom third up over it, like a letter. Then fold the entire rectangle in half, like a book. This is one double turn, which creates multiple layers. Wrap and chill for 30 minutes.
   Look for Dough is smooth, even, and about 8 by 24 inches; the fold is tight and square.
   Tip If the dough resists rolling, let it rest briefly. Never force it; that can tear the layers.
5. 5First single turn
   Roll the chilled dough into another long rectangle, about 8 by 20 inches. Fold the top third down and the bottom third up, like a letter. This is one single turn. Wrap and chill for at least 30 minutes. After this, the dough has 27 layers: the initial butter lock-in plus the double and single turns.
   Look for Dough is smooth, evenly thick, and folds into a neat rectangle without butter escaping.
   Tip Mark the dough with a finger indentation to track the number of turns. Chill between turns to keep the butter firm.

After the double turn and single turn, the dough should be smooth, with no butter visible or escaping. It should be cold and firm, holding its shape without springing back. When rolled, the dough should feel even and thin, with visible striations of butter. If any butter breaks through, dust with flour and chill before continuing. The goal is a dough with 27 distinct layers, ready to be shaped into croissants.

Proofing and Baking

6. 6Shape the croissants
   Roll the laminated dough into a 10-by-30-inch rectangle, about 1/4 inch thick. Trim the edges to make a clean rectangle. Cut the dough into 8 triangles, each about 5 inches wide at the base. Gently stretch each triangle, then roll from the base toward the tip, keeping the point centered underneath. Curve the ends inward to form a crescent shape.
   Look for Triangles are even; croissants are tight spirals with the tip tucked underneath.
   Tip If the dough becomes too soft, chill it for 10 minutes before shaping. Handle gently to preserve the layers.
7. 7Proof the croissants
   Place the shaped croissants on a baking sheet lined with parchment paper, leaving 2 inches between them. Cover loosely with plastic wrap and let proof at 78°F (26°C) until they are wobbly like a marshmallow, about 2 to 3 hours. They should almost double in size and feel airy and light when gently pressed.
   Look for Croissants are puffed, wobbly, and have visible layers; they jiggle like a marshmallow when shaken.
   Tip Keep the proofing temperature steady. Too hot and the butter will melt out; too cool and they will be dense.
8. 8Brush with egg wash
   In a small bowl, whisk the egg yolk with the heavy cream until smooth. Using a pastry brush, gently brush the top and sides of each proofed croissant with the egg wash. Be careful not to deflate the dough. Let the egg wash dry for a few minutes, then apply a second coat for a deep, glossy finish.
   Look for Croissants are evenly coated with a shiny, golden-yellow wash.
   Tip Brush gently and avoid pooling egg wash at the base; that can prevent the layers from lifting.
9. 9Bake until mahogany
   Preheat the oven to 400°F (200°C). Bake the croissants for 16 minutes, until they are deep mahogany golden and the layers are visibly crisp. The internal temperature of the croissants should reach 160°F (71°C) to ensure the egg wash is fully cooked through. Let cool on the baking sheet for 5 minutes before serving.
   Look for Croissants are deeply golden, with audible crackling as they cool; the layers are separate and crisp.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Oven temperatures vary; check at 14 minutes and rotate the sheet if needed. The color should be a rich mahogany, not pale.

The shaped croissants should have proofed until they are wobbly and nearly double in size, with a marshmallow-like jiggle. They should be brushed with a glossy egg wash and baked to a deep mahogany color.

The layers should be visibly crisp and separate, and the interior crumb should be honeycombed and airy. The croissants should crackle when pulled apart, and the aroma should be deeply buttery and nutty. Let them cool slightly before serving.

Common mistakes

One common mistake is letting the butter soften too much during rolling, causing it to squeeze out of the dough and ruin the layers. Always chill the dough between turns if it becomes tacky or soft. Another is rolling the dough too thin or unevenly, which can tear the layers and produce a dense crumb.

Proofing at too high a temperature can melt the butter and cause the croissants to be greasy; keep the proofing area around 78°F. Over-proofing leads to a collapsed structure, while under-proofing results in a tight, bready texture.

How to tell it’s done

The croissants are done when they are deep mahogany golden and the layers are visibly crisp and separate. The internal temperature should read 160°F (71°C) on an instant-read thermometer, ensuring the egg wash is fully cooked.

When tapped, the croissants should sound hollow. Let them cool on the baking sheet for at least 5 minutes; they will continue to crisp as they cool. Pulling one apart should reveal a honeycomb interior with thin, flaky layers that crackle audibly.

• Egg dishes: 160°F (71°C) in the thickest part