INGREDIENTS
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1 cup flour
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1/2 cup sugar
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1/4 cup cocoa powder
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1/4 cup semi-sweet chocolate chips
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1/2 tsp baking soda
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1/2 tsp vanilla extract
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1 egg
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6 tbsp sour cream
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1/4 cup milk
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1/4 cup vegetable oil
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1 cup powdered sugar
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3 tbsp milk
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1 tsp vanilla extract