Prepare brownie mix as per pkg. directions. Pour half of brownie mixture in pan. Unwrap & lay the 3 candy bars on top. Cover with remaining brownie mix.
Bake as per brownie pkg. directions. Remove from oven & immediately unwrap Andies candies and place individually on top of & covering brownies. When candies have melted, spread evenly on top of brownies. (You may need to cover the pan or set back in hot oven to melt candies.) When cool, cut into squares & enjoy!