Butter Croissants

Combine flour, sugar, salt, yeast, cold milk, and soft butter in a stand mixer. Mix on low 3 minutes until combined, then on medium for 4–5 minutes only — stop while the dough is still slightly under-developed (rough surface, barely passing windowpane). Over-kneading the détrempe makes it too elastic to roll easily later. Shape into a rectangle, wrap tightly, and refrigerate overnight or at least 6 hours. Cold détrempe is easier to laminate and helps maintain the butter layers.

Remove the butter from the refrigerator 15 minutes before lamination. Beat it between two sheets of parchment with a rolling pin until it forms a 20×20cm square, 5–6mm thick. The butter must be pliable but cold — 16°C (60°F) is ideal. It should bend without cracking and should not be greasy. If it cracks when bent, it is too cold. If it smears and softens immediately when handled, it is too warm. Proper butter plasticity is the most critical variable in lamination.

Roll the cold détrempe into a 40×20cm rectangle. Place the butter block in the center, fold the dough ends over to completely encase the butter, and pinch the seams closed. Roll out to 60×20cm and perform a letter fold (three-fold). Return to refrigerator for 30 minutes. Repeat this roll-and-fold cycle three more times (4 total), chilling 30 minutes between each turn. After 4 turns of a letter fold you have 3×3×3×3 = 81 layers. Work quickly — if the butter breaks through the dough or you see it smearing, chill immediately.

Roll the laminated dough into a 60×25cm rectangle, 4mm thick. Use a ruler and sharp knife to cut long triangles with a 12cm base. Stretch each triangle gently to 25cm long. Starting at the base, roll firmly toward the point without compressing too hard. The roll should be tight but not squeezing the layers flat. Curl the ends slightly toward you to form the crescent. Place on parchment-lined trays, with the point tucked under. Proof at 75°F (24°C) for 2–3 hours until nearly doubled and visibly layered.

Apply a thin, careful egg wash (egg + milk, well-beaten), brushing with the layers not against them to avoid deflating. Bake at 400°F (200°C) for 18–22 minutes until deep amber-brown. Croissants should puff dramatically in the oven — the butter creates steam that forces the layers apart. If they look pale at 18 minutes, increase to 410°F for a final 3 minutes. A properly baked croissant will leave a visible ring of clarified butter on the parchment.