1/2 c. butter
1 c. sugar
1 egg
1 c. milk
1 tsp. vanilla
2 c. flour
1 1/2 tsp. baking soda
1/2 tsp. baking powder
1/2 c. cocoa
1/2 tsp. salt

Cream together butter and sugar. Add egg, milk and vanilla and mix thoroughly. Mix together remaining ingredients and add to above mixture. Place large spoonful of batter on greased cookie sheet, about 26 mounds to make 13 sandwiches. Bake for 10 minutes at 425 degrees. Cool. Frost flat side of one mound with Betty Crocker Sour Cream canned frosting. Place another mound flat side down, on top of frosting. Individual wrap each sandwich.