INGREDIENTS
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Cake:
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1 box white cake mix
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1/4 teaspoon nutmeg
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4 eggs
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1 cup heavy whipping cream
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1/2 cup sour cream
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2/3 cup oil
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1 teaspoon vanilla
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2 cups fresh blueberries
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Buttercream:
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1/2 cup blueberry jam
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2 cups unsalted butter, room temperature
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4 cups powdered sugar
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2 tablespoons meringue powder
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1 teaspoon vanilla
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2-4 tablespoons heavy whipping cream
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fresh blueberries, for garnish