Makes: about 3 1/2 dozen.
1. Stir together flour, cocoa powder, baking powder and salt on piece of waxed paper.
2. Beat together butter, margarine and sugar in bowl until creamy. Beat in egg and vanilla until well blended. Stir in flour mixture. Shape into disk; wrap in plastic wrap and refrigerate until well-chilled.
3. For each cookie, place mini chocolate kiss on 1/2 tablespoon dough. Press dough around kiss to enclose completely. Place on baking sheets. Bake in 350 degrees F oven 10 to 12 minutes. While still warm, roll in granulated sugar. Cool on wire racks.