Ingredients
1 cup butter, softened1-1/2 cups confectioners’ sugar2 ounces unsweetened chocolate, melted and cooled1 large egg, room temperature1 teaspoon vanilla extract2-1/2 cups all-purpose flour1 teaspoon baking soda1 teaspoon cream of tartar1/4 teaspoon saltFROSTING:1/4 cup butter, softened2 cups confectioners’ sugar2 tablespoons 2% milk1/2 teaspoon peppermint extractGreen food coloring, optional
Preparation
Cream butter and confectioners’ sugar until light and fluffy, 5-7 minutes. Add chocolate, egg and vanilla; mix well. In another bowl, whisk together flour, baking soda, cream of tartar and salt; gradually add to creamed mixture, beating well. Divide dough in half; shape each half into a 2-in.-diameter roll. Wrap in waxed paper; refrigerate until firm, about 1 hour.
Preheat oven to 400°. Unwrap dough and cut crosswise into 1/8-in. slices. Place 2 in. apart on ungreased baking sheets. Bake until edges are firm, 7-8 minutes. Remove from pans to wire racks to cool completely.
Combine all frosting ingredients; beat until smooth. Spread over cookies; let dry completely. Store in airtight containers.
