Cream the sugar, brown sugar, butter, and peanut butter in a separate bowl. Then add vanilla extract and egg.
Slowly, add the try ingredients to the wet until combined.
Shape the cookie dough into balls about 1 inch big. Place them 2 inches apart on an ungreased cookie sheet.
Using your thumb, make an indentation in each cookie.
Using a double boiler, melt chocolate chips. Once melted, whisk chocolate together with other "filling" ingredients.
Place about half a teaspoon of filling into each cookie indentation, trying not to run over the sides. Pinch the sides of the cookies together so that each cookie is nearly closed and you can't see much of the filling.