"A simple batter splits into 3 distinct layers as it bakes in this beautiful magic cake that features creamy custard in the middle...."
INGREDIENTS
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4 eggs at room temperature, separated
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3/4 cup white sugar
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1/2 cup butter, melted
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1 teaspoon vanilla extract
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3/4 cup all-purpose flour
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2 cups lukewarm milk
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2 tablespoons confectioners' sugar, or to taste