INGREDIENTS
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2 cups all-purpose flour
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1/2 cup cocoa powder
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1 tsp baking powder
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1/2 tsp baking soda
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3/4 tsp salt
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1/2 cup granulated sugar
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1/2 cup light-brown sugar
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1/3 cup vegetable oil
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2 large eggs
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1 1/2 tsp vanilla extract
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3/4 cup buttermilk
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Softened butter, for doughnut pan
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3 3/4 cups powdered sugar
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5 Tbsp milk, then more as needed
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1 Tbsp heavy cream
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3/4 tsp vanilla extract
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8 Oreos, crushed
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1 cup heavy cream
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3 Tbsp powdered sugar
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2 Oreos, finely crushed