Peppermint Pinwheels

Directions

1. Cream butter and sugar until light and fluffy, 5-7 minutes; beat in egg yolk and vanilla. In another bowl, whisk together flour, baking powder and salt; gradually beat into creamed mixture. Divide dough in half; mix extract and food coloring into one portion.
2. Between waxed paper, roll each portion of dough into a 16x10-in. rectangle. Remove waxed paper. Place red rectangle over plain rectangle; roll up tightly jelly-roll style, starting with a long side. Wrap in plastic. Refrigerate overnight or until firm.
3. Preheat oven to 350°. Unwrap and cut dough into 1/4-in. slices. Place 2 in. apart on lightly greased baking sheets. Bake until set, 12-14 minutes. Cool on pans 2 minutes; remove to wire racks to cool completely.