Today is National Peanut Butter Day! Peanut Butter and Chocolate are a match made in heaven! I love Retro Ads, especially the ones that include recipes. I was a Brownie (and later a Girl Scout), so this Retro Advertisement caught my eye! You'll love this recipe for Peanut Butter Brownies. However, I would use butter and not margarine. Make these brownies for your Brownie Troop or for yourself to celebrate today's food holiday!