You know those canisters of macaroons that no one eats? (ahem). This recipe puts them to good use. You can always make homemade macaroons and use half of them to serve and half of them in this recipe. A luscious chocolate brownie that tastes like a Passover-correct "Mounds" bar. Make sure, if you use margarine, that it is neither salted nor whipped style. I buy new pans from the dollar store each year to make all my bars and I freeze.