01 -
Heat butter in a steel pan on medium until the bits turn golden amber (takes about 10 mins). Pour everything including the browned bits into your mixing bowl
02 -
Stir the espresso grounds into the butter and let it cool down completely (about 20-30 mins)
03 -
Beat both types of sugar into your cooled butter mix for a full minute until everything's nicely combined
04 -
Beat in the egg, yolk, and vanilla until the mixture looks smooth
05 -
Carefully fold in your flour, baking soda, salt, and chocolate chunks just until mixed
06 -
Drop spoonfuls of dough onto a paper-lined tray and stick in the freezer for 3-4 hours at least but overnight works better
07 -
Heat your oven to 350°F/180°C. Put the frozen dough balls 2 inches away from each other and bake for 10-12 mins until the edges turn golden but centers stay puffy
08 -
Allow your cookies to sit on the baking sheet placed on a wire rack