INGREDIENTS
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3 cups cake flour (sub. 2 2/3 cup all purpose flour + 1/3 cup cornstarch)
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1 1/2 teaspoons baking powder
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3/4 teaspoon baking soda
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1 teaspoon salt
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1 teaspoon ground cinnamon
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1/2 teaspoon ground nutmeg
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3 sticks unsalted butter, softened (1 1/2 cups)
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2 cups granulated sugar
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2 large eggs
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1 tablespoon vanilla extract
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1 cup whole milk
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1 1/2 cup diced green apple (from 2 large peeled granny smiths)
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1/2 cup brown sugar
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2 tablespoons water
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1/3 cup heavy cream
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1 tablespoon vanilla extract
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1 1/4 teaspoon salt
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2 sticks unsalted butter, softened (1 cup)
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2 cups powdered sugar