Fudgy Pinwheel Cookies Recipe

Directions:

1. In a large bowl, cream butter and brown sugar until light and fluffy. Beat in egg yolk and vanilla. Combine the flour, salt and baking powder; gradually add to creamed mixture and mix well.
2. Roll out dough into a 12-in. x 10-in. rectangle between two sheets of waxed paper; transfer to a baking sheet. Refrigerate for 30 minutes.
3. In a small microwave-safe bowl, melt chocolate chips and shortening. Stir in the walnuts, milk and vanilla. Remove waxed paper from dough; spread with filling. Tightly roll up jelly-roll style, starting with a long side. Wrap in plastic wrap; refrigerate for 2 hours or until firm.
4. Unwrap and cut into 1/4-in. slices. Place 2 in. apart on lightly greased baking sheets. Bake at 375° for 8-10 minutes or until set. Remove to wire racks. Store in an airtight container. Yield: about 2-1/2 dozen.