Heat oven to 375°F. Mix 1/2 cup granulated sugar, brown sugar and butter with electric mixer on medium speed until light and fluff. Beat in peanut butter, vanilla and egg until well blended. Mix in flour, baking soda and salt.

Shape dough into 1 inch balls and roll in sugar. Bake for 6-8 minutes. All the cookies to cool for about 2 minutes. Use a teaspoon to make the indentation or “thumprint”.

Microwave your favorite chocolate frosting for about 1 minute or until melted. Use the same teaspoon to fill the cookie well with chocolate. Allow the cookies to cool and serve!