"Chocolate Whoopie Pies - Rich chocolate cake sandwiches filled with a fluffy marshmallow buttercream filling! Easy and delicious!..."
INGREDIENTS
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8 tablespoons butter (softened)
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1 cup powdered sugar
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1 teaspoon vanilla extract
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1 (7 ounce) container marshmallow fluff
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10 tablespoons butter (softened)
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1 1/4 cups granulated sugar
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2 1/4 cups all-purpose flour
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1/2 cup cocoa powder
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1 teaspoon baking soda
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1 cup buttermilk
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1 large egg
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1 teaspoon vanilla extract