A while back, someone requested I make some cupcakes. I wanted them to be special, so I decided to make some cupcakes baked with cookie dough in them. They turned out wonderful, but I learned some lessons.
1) It is best to bake them a little less (maybe 5-6 min) than you would normally for cupcakes, only if you want the “cookie dough” taste to them. If you want the dough in the cupcakes to bake a bit more, leave them in the oven like you would normally.
2) Roll about a teaspoon of cookie dough and drop it into cupcake liners.