Mint Chocolate Cookies

Preheat oven to 350°F. Line 2 baking sheets with parchment paper. Using electric mixer, beat butter and sugar in large bowl until well blended. Beat in eggs and peppermint extract. Add flour, cocoa powder, baking soda, baking powder and salt and beat until well blended. Form dough into 1-inch balls. Place 2 inches apart on prepared baking sheets. Flatten balls slightly to 1 1/2-inch rounds.

Bake cookies until edges begin to firm but center still appears soft, about 13 minutes. Cool on baking sheets 5 minutes. Transfer cookies to racks and cool completely. (Cookies can be prepared up to 5 days ahead. Store in airtight container at room temperature.)