Open up half of the peanut butter cups, there's about 40 in a bag. Cut each peanut butter cup into fourths.

Mix the brownie mix together according to package directions for cake like brownies. Mix in your cut up peanut butter cups and pour into pan prepared according to package directions. (The Betty Crocker one says to spray the bottom of the pan.) Then if you see some pieces of peanut butter cups clumped together in the batter, use a fork to help make sure all the chunks are evenly dispersed.

Cook according to package directions, except remove 5 minutes early from oven. While the brownies cook, open and cut up the other half bag of Reese's the same way. Then when you remove the brownies 5 minutes early, evenly sprinkle the remaining cut up Reese's over the brownies. Return brownies to oven for the remaining 5 minutes or until they pass the toothpick test.

Cool and cut into squares.