Preheat oven to 375°F. Lightly grease cookie sheets or line with parchment paper; set aside.

Beat butter and sugars in large bowl until blended. Add egg and vanilla; beat until fluffy. Combine flour, cocoa, baking powder and baking soda in small bowl; stir into butter mixture. Add oats, chocolate chips, raisins and nuts. Drop by rounded teaspoonfuls 2 inches apart onto prepared cookie sheets.

Bake 10 to 12 minutes or until lightly browned around edges. Remove to wire racks to cool.