Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a large bowl, cream together 🧈 softened butter, 🥜 peanut butter, 🍬 granulated sugar, and 🍯 brown sugar until light and fluffy.
Mix in 🍌 mashed banana, 🥚 egg, and 🌿 vanilla extract until fully combined.
In a separate bowl, whisk together 🌾 flour, 🧂 baking soda, and 🧂 salt. Gradually mix into wet ingredients.
Roll dough into balls, coat with sugar, place on baking sheet, and flatten slightly with your hand. Bake 10–12 minutes until golden. Cool on a wire rack.
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