INGREDIENTS
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2 eggs
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3/4 cup buttermilk
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1/4 cup plain greek yogurt
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1/2 cup canola oil
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1 tablespoon vanilla extract
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1 1/2 cups all-purpose flour
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1 1/2 cups granulated sugar
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1 cup unsweetened cocoa powder
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1 1/2 teaspoons baking soda
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1 1/2 teaspoons baking powder
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1 teaspoon kosher salt
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1/3 cup hot black coffee
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1/2 cup mini semi-sweet chocolate chips (optional)
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3 sticks (1 1/2 cups salted butter) (at room temperature)
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3 cups powdered sugar
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3/4 cup unsweetened cocoa powder
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2 teaspoons vanilla extract
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3-4 tablespoons heavy whipping cream