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Export 6 ingredients for grocery delivery
Step 1
Preheat oven or toaster oven to 350 F. Line a baking sheet with parchment paper.
Step 3
Add the brown sugar, white sugar, and melted butter to a medium bowl and whisk well. Add the egg yolk and vanilla and whisk for 1 minute, or until mixture is smooth and well mixed. Set aside.
Step 5
In a separate bowl, whisk together the flour, cocoa powder, baking soda, and salt until no lumps remain. Pour the dry ingredients into the wet ingredients and stir until just combined (you should not see any flour streaks). Add the chocolate chunks and fold in until incorporated into the dough. Divide dough into four equal portions and form into balls. Slightly flatten each ball until it resemble a hockey puck and place on baking sheet. Be sure cookies are at least 4 inches apart.
Step 7
Cook for 10-12 minutes, or until edges are set but center is still soft. Let cool on baking sheet for 2 minutes and then place on wire rack to finish cooling. Sprinkle a little sea salt on top once cool if desired. Enjoy once cool enough to handle!