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Achievable elevated desserts — laminated doughs, cakes, custards
Science-driven American baking — cookies, pies, cakes with precision
Air-insulated sheet — no burnt bottoms on delicate cookies
Assorted shapes for cookies, biscuits, pastry cutout
Ultra-dark cocoa — Oreo-style cookies, dramatic black baked goods
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Achievable elevated desserts — laminated doughs, cakes, custards
Science-driven American baking — cookies, pies, cakes with precision
Air-insulated sheet — no burnt bottoms on delicate cookies
Assorted shapes for cookies, biscuits, pastry cutout
Ultra-dark cocoa — Oreo-style cookies, dramatic black baked goods
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In a food processor, combine the flour, sugar and salt. Add the butter pieces in 2 additions, pulsing after each addition, until the mixture resembles coarse crumbs. Add the egg yolk and vanilla and pulse until the dough holds together. Divide the dough in half. Transfer one-half to a lightly floured work surface and knead in the cocoa until incorporated. Lightly dust the work surface and a rolling pin with flour. Roll out each dough half into a 3-by-9-inch rectangle, 1/2 to 3/4 inch thick; trim the edges to even out. Place each rectangle on a large baking sheet and cover with plastic wrap. Refrigerate until well chilled, about 30 minutes. Meanwhile, in a small bowl, beat the whole egg until blended. Set aside. Remove the dough from the refrigerator. Using a sharp knife, cut each rectangle into 4 strips about 3/4 inch wide (you should have 4 strips of each color). Arrange 2 chocolate strips and 2 plain strips in a checkerboard pattern, brushing the beaten egg between the strips and gently pressing them together. Repeat with the remaining dough. Wrap in plastic wrap and use a knife to square off the edges of each block. Refrigerate until well chilled, about 30 minutes. Lightly grease 2 baking sheets or line them with parchment paper. Remove the blocks from the refrigerator, unwrap and cut each crosswise into slices 1/4 inch thick. Place them 1 1/2 inches apart on the prepared baking sheets. Bake until the cookies feel firm when lightly pressed, about 15 minutes. Let the cookies sit on the baking sheets for 2 minutes, then use a spatula to transfer them to wire racks to cool completely. Makes about 5 dozen cookies.