Gotta get rid of this candy one way or the other, right? Simple easy - using a boxed brownie mix. Mix your batter according to directions, prepare pan and pour half of batter into pan.
I chopped up all Twix bars into bite sized pieces and just dropped them all over batter. Then I poured rest of batter to cover. Now just push in the rest of Twix bars into the top of brownie batter. Bake according to box.
I had half a can of chocolate frosting so I melted it and poured it all over the baked brownie. Let it set up before cutting, just refrigerate it overnight.
I am sure you could use any type of candy bar that you have or even mix them up for a real "Candy Bar Brownie"!