INGREDIENTS
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For the cake
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2 2/3 c all-purpose flour
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1 1/2 c sugar
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1 c packed light brown sugar
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1/2 c unsweetened nonalkalized cocoa powder
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2 t baking powder
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1 t baking soda
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1/2 t salt
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3 large eggs
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2/3 c sour cream
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1 T vanilla extract
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1 1/2 sticks unsalted butter, melted and cooled
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1/2 c corn oil (I used canola. We survived.)
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1 1/4 ice water
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For the fudge frosting
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6 oz unsweetened chocolate (if you don't like intense dark chocolate like our friend, Alyssa A., you might want to use semi- or bittersweet chocolate)
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2 sticks unsalted butter, softened
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2 c confectioners' sugar, sifted
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1 T vanilla extract
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For the filling
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1 stick unsalted butter, at room temperature
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½ c creamy peanut butter, preferably Skippy
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1 2/3 c confectioners' sugar