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Brown the 115 grams of butter in a saucepan over medium heat, stirring occasionally, until it turns amber and smells nutty. Be careful not to burn it. Set aside to cool slightly.

In a large mixing bowl, combine the slightly cooled browned butter with 100 grams of white sugar and 100 grams of brown sugar. Whisk the mixture until it is well combined and smooth.

Add 1 whole egg and 1 egg yolk to the butter and sugar mixture. Whisk them in until fully incorporated.

Pour in 1 teaspoon of vanilla extract and whisk until thoroughly incorporated into the wet ingredients.

Stir in 1 mashed banana until fully combined with the wet ingredients, ensuring no large lumps remain.

In a separate bowl, whisk together the dry ingredients: 190 grams of all purpose flour, 1 teaspoon of baking soda, and 1/2 teaspoon of salt. Gradually add these dry ingredients to the wet mixture. Gently fold them in using a spatula or wooden spoon until just combined. Be careful not to overmix, as this can lead to tough cookies.

Fold in 150 grams of chocolate chips until evenly distributed throughout the cookie dough.

Preheat your oven to 180°C (350°F). Line a baking sheet with parchment paper. Portion the cookie dough onto the prepared baking sheet, leaving some space between each cookie.

Bake the cookies in the preheated oven for 10-12 minutes, or until the edges are golden brown and the centers are set but still slightly soft.

Once baked, remove the cookies from the oven and let them cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.


Brown the 115 grams of butter in a saucepan over medium heat, stirring occasionally, until it turns amber and smells nutty. Be careful not to burn it. Set aside to cool slightly.

In a large mixing bowl, combine the slightly cooled browned butter with 100 grams of white sugar and 100 grams of brown sugar. Whisk the mixture until it is well combined and smooth.

Add 1 whole egg and 1 egg yolk to the butter and sugar mixture. Whisk them in until fully incorporated.

Pour in 1 teaspoon of vanilla extract and whisk until thoroughly incorporated into the wet ingredients.

Stir in 1 mashed banana until fully combined with the wet ingredients, ensuring no large lumps remain.

In a separate bowl, whisk together the dry ingredients: 190 grams of all purpose flour, 1 teaspoon of baking soda, and 1/2 teaspoon of salt. Gradually add these dry ingredients to the wet mixture. Gently fold them in using a spatula or wooden spoon until just combined. Be careful not to overmix, as this can lead to tough cookies.

Fold in 150 grams of chocolate chips until evenly distributed throughout the cookie dough.

Preheat your oven to 180°C (350°F). Line a baking sheet with parchment paper. Portion the cookie dough onto the prepared baking sheet, leaving some space between each cookie.

Bake the cookies in the preheated oven for 10-12 minutes, or until the edges are golden brown and the centers are set but still slightly soft.

Once baked, remove the cookies from the oven and let them cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.
