"Thanks to the sour cream my recipe for Apple Streusel Coffee Cake is wonderfully moist and keeps well. But even better the streusel adds crunch so it's texturally interesting. I developed the recipe for a class on brunch dishes I taught at Williams-Sonoma a few years back and it's been part of my repertoire ever since because it can be made the day before and if cooled and stored in a plastic cake tastes completely fresh the next day. (Larger image.)..."
INGREDIENTS
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Cake:
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1 cup all-purpose flour
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1/2 tsp. baking powder
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1/4 tsp. baking soda
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1/8 tsp. salt
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1/4 cup butter; at room temperature
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1/2 cup granulated sugar
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1/2 tsp. vanilla
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1 egg
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1/2 cup sour cream
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Streusel/Filling:
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1/2 apple
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1/3 cup brown sugar, packed
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1/4 cup all-purpose flour
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1/4 cup quick cooking oats
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1/4 tsp. ground cinnamon
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1/8 tsp. salt
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2 Tbsp. butter; cut into small pieces
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1 Tbsp. shortening; cut into small pieces
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1/4 cup pecan pieces