"Topped with a marshmallow frosting, these softy and chewy oatmeal cream pie bars are reminiscent of the beloved packaged snack. Bake them for a dose of sweet nostalgia!..."
INGREDIENTS
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1 1/4 cups (150g) King Arthur Unbleached All-Purpose Flour
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1 teaspoon salt
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1/2 teaspoon baking soda
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12 tablespoons (170g) unsalted butter at room temperature
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3/4 cup (160g) dark brown sugar or light brown sugar packed
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1/3 cup (66g) granulated sugar
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1 1/2 teaspoons cinnamon preferably Vietnamese
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3/4 teaspoon ginger
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1 1/2 teaspoons King Arthur Pure Vanilla Extract
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2 large eggs
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1 3/4 cups (156g) quick-cooking oats or instant oats*
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3/4 cup (138g) vegetable shortening or 8 tablespoons (113g) unsalted butter softened
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3/4 cup (85g) confectioners' sugar
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1 cup (128g) Marshmallow Fluff or 1 cup (123g) marshmallow crème store-bought*
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1/2 teaspoon King Arthur Pure Vanilla Extract
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1 teaspoon water
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1/4 teaspoon salt
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sprinkles optional