Place butter in skillet and  cook over medium heat until butter is melted.

Once melted, continue to cook while constantly stirring as butter sizzles and pops. 

Once butter begins to brown (you’ll see golden brown flecks) immediately remove from heat. Allow butter to cool for 30 minutes before proceeding.

Once butter is no longer warm to the touch, add sugars, egg, egg yolk, and vanilla extract and stir well to combine.

Then, gradually stir dry ingredients into the butter mixture until dough is cohesive and completely combined

Stir in chocolate and flatten the surface of the cookie with a spatula or the back of a spoon.

Transfer to 350F (175C) preheated oven and bake for 28-30 minutes or until cookie is baked through.

Allow to cool for 10-15 minutes before topping with ice cream and serving still warm. Enjoy!