Prepare Dry Ingredients: In a medium bowl, whisk together all-purpose flour, baking soda, salt, and ground cinnamon.

Cream Butter and Sugars: In a large mixing bowl, cream together softened unsalted butter with granulated sugar and brown sugar until light and fluffy.

Combine Wet Ingredients: Add the egg, vanilla extract, and mashed ripe bananas to the creamed mixture and beat until evenly mixed.

Mix Dry with Wet: Gradually add the dry ingredients to the wet mixture and stir gently until just combined; fold in chopped walnuts if desired.

Form Cookies: Drop rounded portions of dough onto a parchment-lined baking sheet, spacing them 2 inches apart.

Bake: Preheat oven to 350°F (175°C) and bake for 10-12 minutes until edges are golden and centers are soft.

Cool: Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack.

Prepare Glaze: Combine softened cream cheese, powdered sugar, milk, and vanilla extract until smooth and creamy, then drizzle over cooled cookies.