INGREDIENTS
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For Streusel:
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cup rolled oats
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cup flour
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cup dark brown sugar
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teaspoon ground cinnamon
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teaspoon coarse salt
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tablespoons melted butter
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For Cake:
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tablespoons melted butter, plus more for the pan
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cups flour
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teaspoons baking powder
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teaspoon baking soda
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teaspoons ground cinnamon
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teaspoon ground nutmeg
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teaspoon ground cloves
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teaspoon coarse salt
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large egg, beaten
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cup canned pumpkin
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cup dark brown sugar
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cup buttermilk
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teaspoons vanilla extract