I got this recipe off of the Reese's bag. They are simple to make.
About 40 Reese's Peanut Butter Cup Miniatures
1/2 cup (1 stick) butter or margarine, softened
1/2 cup granulated sugar
1/2 cup packed light brown sugar
1/2 cup creamy peanut butter
1/2 teaspoon vanilla
1-1/2 cups all-purpose flour
3/4 teaspoon baking soda
1/2 teaspoon salt
1. Heat oven to 375ºF. Remove wrappers from candies. Line small muffin cups (1-3/4 inches in diameter) with paper bake cups, if desired.
2. Beat butter, granulated sugar, brown sugar, peanut buter, egg and vanilla until fluffy in large bowl. Stir together flour, baking soda and salt; gradually add to butter mixture, beating until well blended. Shape dough into 1-inch balls; place one in each paper-lined or ungreased muffin cup. Do not flatten.
3. Bake 10- 12 minutes until puffed and lightly browned; remove from oven. Immediately press peanut butter cup in center of each cookie. Cool completely in muffin pan.