INGREDIENTS
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Nonstick cooking spray, for pan
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1 box yellow cake mix, plus ingredients called for on box
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1 c. dulce de leche, slightly warmed (plus more for drizzling)
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2 c. cold heavy cream
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1/4 c. powdered sugar
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1/2 tsp. pure vanilla extract
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1/4 tsp. cinnamon
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1 banana, sliced