01 -
Heat butter in a steel pan on medium until the solids turn golden amber, taking about 10 minutes. Pour everything including the brown bits into your mixing bowl
02 -
Stir the espresso grounds into the butter and let it sit until it cools down completely, around 20-30 minutes
03 -
Beat both sugars into your cooled butter mix for a full minute until they're totally blended
04 -
Add your egg, yolk, and vanilla, then whisk everything till it looks smooth
05 -
Carefully mix in your flour, baking soda, salt, and chocolate bits just until everything comes together
06 -
Drop scoops of dough onto a parchment-covered tray and stick in the freezer for 3-4 hours at least, but better if left overnight
07 -
Heat your oven to 350°F/180°C. Put the frozen dough balls 2 inches from each other and bake 10-12 minutes until the edges turn golden but the middle stays light and puffy
08 -
Leave the cookies on the baking sheet and place it on a wire rack to cool down