1 1/4 c. butter, softened
2 c. sugar
2 eggs
2 tsp. vanilla extract
2 c. all-purpose flour
3/4 c. Hershey's cocoa
1 tsp. baking soda
1/2 tsp. salt
2 c. (12 oz. pkg.) Reese's peanut butter chips

Heat oven to 350 degrees. Cream butter and sugar until light and fluffy. Add eggs and vanilla. Beat well. Combine flour, cocoa, baking soda and salt; gradually blend into creamed mixture. Stir in chips. Drop by teaspoon onto ungreased cookie sheet. Bake 8 to 9 minutes. (Do not overbake; cookies will be soft. They will puff while baking and flatten while cooling.) Cool slightly; remove from cookie sheet onto wire rack. Cool completely. Makes about 4 1/2 dozen.