You can use store-bought refrigerated cookies, but you have to freeze them before you bake them into the cupcake or they will cook. You can also use homemade cupcakes, but I used a mix to test these. Next time I will use homemade.
Chocolate Chip Cookie Dough Frosting (there's a mouthful)
1/2 cup butter, softened
2 Tbsp brown sugar (don't skip it - this is what gives it the cookie dough flavour)
1 tsp vanilla
2 cups powdered sugar
1-2 Tbsp milk (optional)
1/8 cup mini chocolate chips (I used 1 square of unsweetened chocolate and chopped it up really fine)
Cream together butter and brown sugar. Mix in vanilla. Gradually add powdered sugar until frosting reaches desired consistency.
Frost cooled cake/cupcakes & enjoy!