Delicate Mint Thins

1/2 cup butter, softened
1/2 cup sugar
1 egg yolk
1/2 teaspoon vanilla extract
1-1/2 cups all-purpose flour
1-1/2 teaspoons baking powder
1/8 teaspoon salt
3 tablespoons milk
1 cup fresh mint, finely chopped
1-2/3 cups semisweet chocolate chips
1 tablespoon shortening

In a large bowl, cream butter and sugar until light and fluffy. Beat in egg yolk and vanilla. Combine the flour, baking powder and salt; add to creamed mixture alternately with milk, mixing well after each addition.

Stir in mint. Shape into two 8-in. rolls; wrap each in plastic wrap. Refrigerate for 2 hours or until firm.

Unwrap and cut into 1/4-in. slices. Place 1 in. apart on greased baking sheets. Bake at 350° for 8-12 minutes or until edges are golden. Remove to wire racks to cool.

In a microwave-safe bowl, melt chocolate chips and shortening; stir until smooth. Dip each cookie halfway; allowing excess to drip off. Place on waxed paper; let stand until set. Makes about 4-1/2 dozen.