Chocolate Pecan Squares

Cocoa Cookie Dough

• 12 tablespoons (1½ sticks) unsalted butter, softened
• ¾ cup

1. To make the dough: beat the butter and sugar with a hand mixer set at medium speed, or in a heavy-duty mixer fitted with the paddle attachment, until it is soft and pale in color. Add the yolks, one at a time, beating well between each addition. Continue to beat until the mixture is light and very smooth. Sift together the cocoa and flour several times to break up any lu