Preheat the oven to 350°F.

Line two baking sheets with parchment paper.

Melt the semi-sweet chocolate chips and unsalted butter until smooth.

Let the melted chocolate mixture cool for 2 minutes.

In a separate bowl, whisk the eggs and granulated sugar for 2 to 3 minutes until thicker and a bit paler.

Whisk in the vanilla extract.

Pour the warm melted chocolate mixture into the egg mixture while whisking steadily.

Switch to a spatula.

Fold in the cocoa powder, flour, baking powder, and fine salt until no streaks remain.

Let the batter rest for 5 minutes.

Scoop 1 1/2 tablespoon mounds onto the parchment-lined baking sheets, spacing them 2 inches apart.

Bake for 9 to 11 minutes at 350°F until the tops look set and crackly.

Cool the cookies on the baking sheet for 10 minutes.

Transfer the cookies to a cooling rack.