INGREDIENTS
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3 cups flour
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2 cups sugar
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6 Tablespoons cocoa
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2 teaspoons baking soda
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1 teaspoon salt
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2/3 cup melted butter
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2 Tablespoons white vinegar
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2 cups cold water
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2 sticks butter, room temperature
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1 (7-ounce) jar marshmallow cream
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1/4 teaspoon salt
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1 Tablespoon vanilla
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3-4 cups powdered sugar
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3 Tablespoons heavy cream
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16 Oreo cookies