01 - Preheat oven to 350°F. Line an 8x8-inch baking pan with parchment paper, leaving an overhang for easy removal.
02 - Whisk together almond flour, cocoa powder, fine sea salt, and baking powder in a medium bowl.
03 - In a large bowl, whisk melted butter, granulated sugar, brown sugar, eggs, and vanilla extract until smooth and glossy.
04 - Add dry ingredients to wet ingredients and mix until just combined, avoiding overmixing.
05 - Gently fold chopped chocolate or chocolate chips into the batter.
06 - Pour batter into prepared pan and smooth the surface with a spatula.
07 - Sprinkle flaky sea salt evenly over the batter.
08 - Bake for 22 to 25 minutes, or until center is set and a toothpick inserted comes out with a few moist crumbs.
09 - Allow brownies to cool completely in the pan on a wire rack before lifting out using the parchment overhang and slicing.