INGREDIENTS
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Topping
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2/3 c. brown sugar
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1/3 c. walnuts, chopped
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1 tsp. cinnamon
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2 tbsp. all-purpose unbleached flour
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2 tbsp. unsalted butter, room temperature
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3/4 c. semisweet chocolate chips
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dash of sea salt
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Cake
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1/2 c. (1 stick) unsalted butter
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1 c. all-purpose unbleached flour
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1/2 c. wheat flour
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3/4 tsp. baking soda
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3/4 tsp. baking powder
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1/4 tsp. sea salt
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3/4 c. sugar
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1 large egg
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1/4 c. buttermilk
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1 tsp. pure vanilla extract
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3 very ripe bananas, mashed