"Hint: it's a peanut butter swirl...."
INGREDIENTS
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Nonstick baking spray
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3/4 c. all-purpose flour
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1 c. granulated sugar
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1/3 c. unsweetened cocoa powder
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1 tsp. baking soda
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1/2 tsp. baking powder
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3/4 tsp. salt
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1/2 c. buttermilk
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1/4 c. canola oil
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1 large egg, at room temperature
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1 1/2 tsp. vanilla extract
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1/2 c. freshly brewed strong coffee
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1 c. bittersweet chocolate chips
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1 tbsp. salted butter
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1 c. heavy cream
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1 1/2 tbsp. light corn syrup
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1/2 c. peanut butter chips
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1 tbsp. salted butter