Cocoanut Brownies: Retro Ad & Recipe

I love Retro Chocolate Ads with Recipes. This one for Cocoanut Golden Brownies is from the 1950s. Unfortunately  are no longer made. The recipe says you can't substitute any other bar; however, that's just a 50s advertising ploy. I've substituted Mounds Bars in this recipe. If you like a moister brownie, you can add a little more shortening! The recipe calls for butter or margarine--margarine being very popular in the1950s. I only use butter!