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INGREDIENTS
- 1 ripe banana, mashed
- ½ cup unsalted butter, softened
- ½ cup brown sugar
- ¼ cup granulated sugar
- 1 large egg
- 1 teaspoon vanilla extract
- 1 ½ cups all-purpose flour
- ½ teaspoon baking soda
- ½ teaspoon salt
- ½ teaspoon cinnamon
- ½ cup chopped walnuts or chocolate chips (optional)
