1Heat oven to 375°F.
2In large bowl, stir cookie mix, egg, cocoa and 3/4 cup of the frosting until soft dough forms.
3Shape dough into 24 (1 1/4-inch) balls. On ungreased cookie sheets, place balls about 2 inches apart. Bake 11 to 13 minutes, or until set. Cool 1 to 2 minutes. Remove from cookie sheet to cooling rack. Cool completely, about 30 minutes.
4Spread remaining frosting evenly over cookies. Sprinkle with chocolate.