In a medium bowl, whisk together 1 cup of partially melted butter with 1 1/4 cups of brown sugar, 1/2 cup of granulated sugar and 1 tablespoon of vanilla extract
Add 1 large egg and 2 large egg yolks and whisk until combined
In a large bowl, combine 2 1/2 cups of all purpose flour with 1/4 cup of espresso powder, 1/4 cup of unsweetened cocoa powder, 1/2 teaspoon of salt and 3/4 teaspoon of baking soda
Add the butter and sugar mixture into the flour mixture and mix until just combined
Gently fold in 1 cup of semi-sweet chocolate chipsĀ
Cover the bowl with plastic wrap and chill in the refrigerator for 30 minutes
Preheat your oven to 350 degrees
Scoop golfball sized balls of chilled dough onto a parchment lined baking sheet keeping them 2 inches apart
Bake for 10-12 minutes or until the edges are just beginning to brown and the centers still a little soft
Transfer the baking sheet onto a cooling rack and immediately press a few chunks of dark chocolate over each hot cookie and sprinkle with sea salt
Serve with cold milk and enjoy!