1/2 c. granulated sugar
1/2 c. light brown sugar
1/2 c. butter, softened
1/2 c. smooth peanut butter
1 egg
1/2 tsp. vanilla
1 1/4 c. flour
1 tsp. baking soda
1/2 tsp. salt
36 Reeses peanut butter cups (sm. size)

Cream together first 6 ingredients. Mix flour, baking soda and salt together and add to creamed mixture. Roll dough into 36 balls, about 1 teaspoon each. Fit ball loosely into small muffin tins. Bake 8-10 minutes at 350 degrees. Remove from oven and immediately put a peanut butter cup into each cookie. Cool completely in muffin tin before removing.