"These Oatmeal Sandwich Cookies are to die for! Chewy oatmeal cookies filled with a chocolate marshmallow crème frosting. These are the most irresistible cookies ever and will completely change your mind about how amazing oatmeal cookies truly are...."
INGREDIENTS
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1 2/3 cups all-purpose flour
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1 1/2 cups old fashioned oats
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1/2 teaspoon salt
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1/2 teaspoon baking soda
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1 teaspoon ground cinnamon
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1 cup unsalted butter, room temperature
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1 cup brown sugar
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1/4 cup granulated sugar
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1 large egg, room temperature
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1 large egg yolk
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1 teaspoon pure vanilla extract
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3/4 cup unsalted butter, room temperature
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7 ounces marshmallow cream
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2 1/2 cups powdered sugar
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1/4 cup unsweetened cocoa powder
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1/4 teaspoon salt
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2-3 tablespoons heavy cream