Whisk together the all-purpose flour, espresso powder, cocoa powder, salt, and baking soda in a medium bowl.
2 Cups + 2 Tablespoons All-Purpose Flour, ¾ teaspoon Kosher Salt, ½ teaspoon Baking Soda, 3 tablespoons Cocoa powder, 1 tablespoons Espresso powder
Mix together the melted butter & sugar, then eggs, yolk and vanilla in a separate bowl.
¾ Cup Unsalted Butter, ¾ Cup Granulated Sugar, ¾ cup Brown sugar, 2 Eggs, 1 Egg yolk, 1 Tablespoon Vanilla Extract
Add the flour mixture to the wet and stir until everything is combined. Finally, stir in the dark chocolate. Using a medium cookie scoop, scoop dough and place them on a lined plate or small baking tray.
1 Cup Dark Chocolate
Place your dough in the fridge for 2 hours or overnight.
Prepare your baking sheets with parchment paper. Place the cookie dough balls about 2 inches apart on your baking sheets. Preheat oven to 350 degrees and, one sheet at a time, bake your cookies until the edges are firm and the centers are soft, about 12-14 minutes.
Once the cookies come out of the oven, use a round cookie cutter or glass to scoot the edges in and make them perfectly round.
Cool your cookies on a wire rack or cooling rack, pour yourself a hefty glass of milk, dunk your perfect cookie, and enjoy!
Flakey sea salt