1 cup chopped up candy bars, (I used Nestle Crunch, Babe Ruth and Butterfingers)
Preheat oven to 350 degrees F (175 degrees C). Grease a 9x9 inch baking pan.
In a medium bowl, mix together the oil, sugar, and vanilla. Beat in eggs. Combine flour, cocoa, baking powder, and salt; gradually stir into the egg mixture until well blended. Stir in walnuts, if desired. Spread the batter evenly into the prepared pan. Sprinkle candy bar on top. With a spoon or knife gentle press candy bar into batter.
Bake for 20 to 25 minutes, or until the brownie begins to pull away from edges of pan. Let cool on a wire rack before cutting into squares.