Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.
In a microwave-safe bowl, melt the butter with 1 cup of chocolate chips in 30-second intervals until smooth. Let it cool for a minute.
Whisk in the brown sugar and granulated sugar. Add the eggs and vanilla extract, and whisk until the mixture looks glossy.
Stir in flour, cocoa powder, baking powder, and salt until just combined. Fold in the remaining 1/4 cup of chocolate chips.
Scoop the dough onto the baking sheets using a cookie scoop. Leave space—they spread! Sprinkle with flakey sea salt if using.
Bake for 8–10 minutes, or until the tops are crackly but the centers still look slightly underdone. That’s the fudgy part.
Let cool on the tray for 5 minutes before transferring to a wire rack. Then? Eat one warm. You’ll thank me later.