INGREDIENTS
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1 1/2 cups all-purpose flour
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2 Tbsp unsweetened cocoa powder
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1 tsp baking soda
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1/4 tsp baking powder
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1/4 tsp salt
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1 cup granulated sugar
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1/2 cup unsalted butter, softened
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1 large egg
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1 Tbsp liquid red food coloring
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2 cups powdered sugar
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1/2 cup vegetable shortening
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1/2 cup unsalted butter, softened
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1 Tbsp hot water
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1/2 tsp vanilla extract