INGREDIENTS
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6 ounces old-fashioned rolled oats (not instant)
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3 ounces all-purpose flour
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1 teaspoon baking soda
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1/4 teaspoon baking powder
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1/4 teaspoon kosher salt
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1/2 cup unsalted butter, at room temperature
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8 ounces granulated sugar
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2 large eggs
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1/2 teaspoon vanilla extract
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1 cup (2 to 3) very ripe bananas, mashed