INGREDIENTS
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1 box yellow or white cake mix
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3 eggs
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1/2 C. melted butter, cooled
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3/4 C. milk or buttermilk
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1/2 C. sour cream
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2 tsp. vanilla extract
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1 1/2 C. mini chocolate chips
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1 C. butter, softened
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1/2 C. unsweetened cocoa powder
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2 tsp. vanilla extract
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1 Tbsp. milk
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2-3 C. powdered sugar