Chocolate Chip Banana Cookies

Start by browning the butter. You'll take ½ cup (1 stick) of butter, and melt in a medium saucepan, continuing to cook past the point of boiling. You will do this over medium heat, past the point of the butter foaming, until it turns a nice golden brown, and has a nutty smell. Make sure you are stirring and watching it, because it will turn from perfectly brown to burnt fairly quickly. Once finished browning, pour into a cup or bowl and allow to cool. You can put it in the fridge for 10-15 minutes to speed it up.
Preheat oven to 350 F. Line two baking sheets with parchment paper.
Mash your brown banana in a medium bowl. Add in cooled browned butter, sugars, egg yolk and vanilla and mix until combined.
Mix in the salt, baking soda, cinnamon, espresso powder and flour until combined.
Fold in the chocolate chips.
Scoop cookie dough into 3 tablespoon size balls and place 5-6 per baking sheet. Top dough balls with extra chocolate chips and a sprinkle of flaked salt.
Bake the cookies for 10-12 minutes. You're looking for a light golden brown outside rim. Sprinkle with a bit more salt.