PREHEAT oven to 350° F.
COMBINE flour and baking soda in medium bowl. Beat butter, granulated sugar, brown sugar, egg, and vanilla extract in large mixer bowl until creamy. Gradually beat in flour mixture. Remove 3/4 cup dough; set aside.
BEAT cocoa gradually into remaining dough in bowl. Stir in 3/4 cup morsels. Roll chocolate dough into 3/4-inch ball. Place on ungreased baking sheet and press to 1/4-inch thickness. Roll chocolate dough into two 1/2-inch balls. Place each above larger circle and press to 1/4-inch thickness for ears. Roll reserved white dough into 1/4-inch ball and place in center of large circle for nose. Repeat with remaining doughs, placing cookies 2 inches apart on baking sheet.
BAKE for 8 to 10 minutes or until dough is set. Arrange mini morsels on warm cookies for eyes and one on top of nose. Cool on baking sheets for 2 minutes; carefully remove to wire racks to cool completely.