Ingredients
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1 ½ cups all-purpose flour
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½ teaspoon baking soda
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½ teaspoon baking powder
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½ teaspoon salt
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½ teaspoon cinnamon (optional)
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½ cup unsalted butter, softened
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¾ cup brown sugar
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1 large egg, room temperature
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1 teaspoon vanilla extract
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1 cup mashed ripe bananas (about 2 large bananas)
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½ cup chopped walnuts or chocolate chips (optional)
Instructions
Preheat the oven to 350°F (175°C). Line baking sheets with parchment paper and set aside.
In a medium bowl, whisk together the flour, baking soda, baking powder, salt, and cinnamon. Set aside.
In a large mixing bowl, beat the softened butter and brown sugar together until light and creamy, about 2 minutes. This creates a soft cookie base.
Mix in the egg and vanilla extract until fully combined. Add the mashed bananas and mix gently until smooth and evenly incorporated.
Add the dry ingredients to the wet ingredients and mix just until combined. Fold in walnuts or chocolate chips if using. Scoop tablespoon-sized portions onto the prepared baking sheets and bake for 10–12 minutes, until the cookies are set and lightly golden around the edges. Cool on the baking sheet for 5 minutes before transferring to a wire rack.
Notes
These cookies are meant to be soft and cake-like rather than crisp. Avoid overbaking, as they will continue to set while cooling and can dry out if left in the oven too long.