1Heat oven to 350°F. Grease 36 mini muffin cups with shortening or cooking spray.
2In small bowl, mix flour, baking soda and salt; set aside. In medium bowl, beat sugar, peanut butter and butter with electric mixer on medium speed 2 minutes. Beat in egg, whipping cream and vanilla. On low speed, beat in flour mixture until blended. Stir in peanuts.
3Shape dough into 3/4-inch balls.Place one ball into each muffin cup.
4Bake 12 minutes. Immediately press 1 peanut butter cup into center of each cookie. Bake 2 minutes longer. Cool in pan on cooling rack.