2 c. flour
1/2 c. cocoa
1 1/2 tsp. baking soda
1/4 tsp. salt
1/2 c. butter
1 c. sugar
1 egg
1/2 tsp. vanilla
1 c. milk

Sift together flour, cocoa, baking soda, and salt. Cream butter and sugar; add egg and vanilla. Alternately beat in flour mixture and milk until smooth.

Drop by teaspoonfuls onto ungreased baking sheets to form 24 rounds. Bake at 425 degrees for 7 minutes or until done. Remove from sheets and cool on wire racks.

DESSERT BURGER FILLING:

1/2 c. butter
2 1/4 c. confectioners sugar
1/2 tsp. vanilla
2 egg whites

Cream butter until light. Gradually beat in 1 cup confectioners sugar; add vanilla.

Beat egg whites until foamy. Beat in rest of confectioners sugar until blended. Thoroughly combine both mixtures.

Spread on flat side of 12 rounds. Top with remaining rounds. Store in refrigerator.