I use a regular brownie mix and add a 4.25 oz. Symphony Bar with toffee bits. I chop the candy bar up into approximately 1/2 inch pieces. Mix the brownie mix as directed on the box. Place about 1/2 the batter in the bottom of your greased pan ( I use spray in the pan first). Sprinkle the candy bar bits on top of the batter and finish with the rest of the batter. Bake for the longest time on the box. Allow to cool before cutting.