Many decades ago, Mom made a great sour cream chocolate cake. Aunt asked for recipe for family party. But no cake appeared, only delish frosted brownies. When asked for recipe, she replied: it's your Mom's cake, but I didn't have baking powder, so used baking soda, didn't have chocolate squares, so used cocoa; & didn't have sour cream, so used Pream & vinegar! Frosted them to hide cracks! Unreproducible, but a success'

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