Follow the directions on the box of brownie mix.. Pour batter into a muffin pan. Don't forget to spray with cooking spray unless using cupcake liners.
Cook for about 13 to 15 mins or until the top is set & a toothpick inserted into center comes out slightly wet. After brownies are out of the oven, wait for centers to fall. This should happen while cooling off. If not then tap the centers with the back of a teaspoon to make a hole for the peanut butter to fall in to. Put peanut butter in the microwave for about 45 seconds. While the brownies are still warm spoon about half a teaspoon of peanut butter into the center of them. Top with chocolate chips and peanut butter chips. (I forgot the peanut butter chips)