"Buttermilk, chocolate chips, and coffee combine to provide sweet layers of flavor and texture in these easy baked donuts...."
INGREDIENTS
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1 teaspoon unsalted butter
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1 cup all-purpose flour
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1/4 cup unsweetened cocoa powder
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1 teaspoon baking powder
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1/2 cup packed brown sugar
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1/4 cup buttermilk
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2 tablespoons buttermilk
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1/4 cup strong brewed coffee
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1 egg
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1 tablespoon unsalted butter
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1/2 teaspoon vanilla extract
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1/4 cup chocolate chips, or to taste (optional)