Step 1

Preheat oven to 350 degrees and line 2 baking sheets with parchment paper.

Step 2

In a medium bowl, cream butter and brown sugar together until smooth and light colored.

Step 3

Add sea salt and baking soda and stir.

Step 4

Add egg and vanilla extract and mix until just combined.

Step 5

Stir in cocoa powder.

Step 6

Add flour, half at a time and mix until just combined.

Step 7

Using a 3 TBS cookie scoop, scoop dough and place 2 inches apart on the cookie sheet.

Step 8

Bake for 12 minutes, rotating halfway through.

Step 9

Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack.

Step 10

Store cookies in an airtight container for 4-5 days or freeze.