INGREDIENTS
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1 cup flour
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1/2 cup whole wheat flour
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1 tsp kosher salt
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1/2 tsp baking soda
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3/4 cup unsalted butter, at room temperature
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1/2 cup white sugar
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1/2 cup light brown sugar, packed
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1 large egg
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1 1/2 tsp vanilla
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1/2 cup ripe banana, mashed
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1 cup old fashioned rolled oats
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8 ounces semisweet chocolate chips
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1/2 cup walnuts, toasted & coarsely chopped