INGREDIENTS
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12 tbsp. butter, softened (divided); plus more for greasing pan
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1/2 c. granulated sugar
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1 large egg
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1 tsp. vanilla
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1/2 c. sour cream
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1 1/2 c. flour (divided)
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1/2 tsp. baking soda
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1/4 tsp. kosher salt
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1/2 tsp. baking powder
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1/2 tsp. ground cinnamon
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1/2 c. packed light brown sugar
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1 c. peeled, cored and chopped apples (about 1/2" pieces)
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1/3 c. caramel sauce, warmed