Chocolate-Mint Thumbprints

• Cookies
• 1/2 cup sugar
• 1 cup butter, softened
• 1 teaspoon vanilla
• 1 egg yolk
• 1 1/2 cups flour
• 1/4 cup baking cocoa
• Mint Filling
• 1/4 cup butter, softened
• 1 cup powdered sugar
• 1 tablespoon milk
• 1/4 teaspoon peppermint extract
• 2 drops green food coloring
• 1/4 cup semi-sweet chocolate chips
• 1/4 teaspoon shortening

1. Heat oven to 375. In large bowl, beat sugar, 1 cup butter and the vanilla with electric mixer on medium speed until fluffy. Beat in egg yolk until smooth. Beat in flour and cocoa.
2. Shape dough by rounded teaspoonfuls into 1 inch balls. On ungreased cookie sheet, place balls 1 inch apart. With inxes finger or thumb, make indentation in center of each ball.
3. Bake 7-9 minutes or until set. Immediately remove from cookie sheet to wire rack. Cool completely, about 30 minutes.
4. In small bowl, beat 1/4 cup butter and the powdered sugar on low speed until smooth. Beat in milk, peppermint extract and enough food color for desired color. Spoon about 1/2 t. filling into each cookie.
5. Melt the chocolate chips and shortening, and drizzle over the tops of each cookie.

cookies, sugar, butter, vanilla, egg yolk, flour, baking cocoa, filling, butter, powdered sugar, milk, peppermint, semisweet chocolate chips, shortening

Taken from www.food.com/recipe/chocolate-mint-thumbprints-140735 (may not work)