INGREDIENTS
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1 box devil's food cake mix
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3 eggs
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1/2 C. oil
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1/2 C. buttermilk or milk
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1/2 C. sour cream or plain yogurt
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2 tsp. vanilla extract
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1 3/4 C. zucchini, grated (about 2 zucchini)
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1 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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1 tsp. vanilla extract
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3 Tbsp. milk
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3 1/2- 4 1/2 C. powdered sugar