01 -
In a small saucepan, warm ½ cup of butter over medium heat. Stir every so often for 3-5 minutes until you get a golden color and nutty smell. Let it cool in a bowl for 5 minutes.
02 -
Set your oven to 350°F. Cover two baking trays with parchment paper or baking mats.
03 -
With a mixer, whip the brown butter, remaining ½ cup of butter, and brown sugar in a large bowl for 3 minutes until fluffy. Mix in the egg, yolk, and vanilla for another minute. Add the flour, baking soda, and salt, blending until smooth. If it feels too sticky, throw in 1-2 more tablespoons of flour.
04 -
Place the dough in the fridge for at least half an hour.
05 -
Scoop dough balls onto the trays, keeping around 2 inches between each. Bake for 10 minutes or until the edges turn golden but the middle stays soft.
06 -
Leave the cookies on the tray until their centers are firm. Then move them to a wire rack to cool completely.