Preheat your oven to 350°F (175°C).

In a medium saucepan over low heat, melt the unsalted butter. Let it cool slightly.

In a large mixing bowl, combine the melted butter with granulated sugar and brown sugar. Mix until well blended.

Crack in the eggs and add the vanilla extract. Stir until thick and glossy.

In a separate bowl, sift together all-purpose flour, cocoa powder, salt, and baking powder.

Gradually add the dry mixture to the wet ingredients, stirring until just combined. Be careful not to over-mix.

Fold in the chocolate chips gently.

Using a tablespoon, scoop the dough onto lined baking sheets with space between each cookie. Sprinkle a pinch of sea salt on top.

Place in the preheated oven and bake for 10-12 minutes, or until the edges are firm but the centers are still soft.

Remove from the oven and let cool on the baking sheet for a few minutes before transferring them to a wire rack.