Preheat the oven to 350.
Combine the flour and baking soda in a mixing bowl.
Beat together the butter, peanut butter, and sugars.
Add the egg, vanilla, and heavy whipping cream to the sugar mixture.
Slowly beat the flour mixture into the sugar mixture.
Shape the dough into 40 balls and place in mini muffin tin.
Bake for 8 - 10 minutes.
As soon as you take the muffin tin out of the oven place a peanut butter cup in the middle of each cookie and press down.
Allow cookies to cool in the muffin tin for about 10 minutes then remove to cooling rack to allow chocolate to reharden before you store the cookies.