"Classic New York-style crumb cake, based on the old German krummelkuchen. It is important to make the crumbs into large, pea-sized lumps to get the right texture. This is NOT a streusel! From "America's Test Kitchen" episode 816, "Old-Fashioned Breakfast Cakes."..."
INGREDIENTS
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1/3 cup white sugar
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1/3 cup packed dark brown sugar
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1/4 teaspoon salt
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3/4 teaspoon cinnamon
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8 tablespoons butter, melted and cooled slightly (one stick)
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1 3/4 cups cake flour
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1 1/4 cups cake flour
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1/2 cup white sugar
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1/4 teaspoon table salt
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1/4 teaspoon baking soda
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6 tablespoons butter, softened but still cool
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1 teaspoon vanilla
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1/3 cup buttermilk
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1 large egg
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1 large egg yolk
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powdered sugar