01 - Preheat the oven to 350°F. Line an 8x8-inch baking pan with parchment paper, ensuring enough overhang for easy removal of the brownies.
02 - In a medium bowl, whisk together the almond flour, unsweetened cocoa powder, fine sea salt, and baking powder until evenly distributed.
03 - In a large bowl, vigorously whisk the melted butter, granulated sugar, brown sugar, eggs, and vanilla extract until the mixture is smooth and glossy.
04 - Add the dry ingredient mixture to the wet ingredients. Mix gently until just combined, taking care not to overmix to maintain a fudgy texture.
05 - Gently fold the chopped semi-sweet chocolate or chocolate chips into the batter.
06 - Pour the batter into the prepared baking pan. Use a spatula to smooth the top into an even layer.
07 - Sprinkle the flaky sea salt evenly over the surface. Bake for 22 to 25 minutes, or until the center is just set and a toothpick inserted comes out with a few moist crumbs.
08 - Allow the brownies to cool completely in the pan set on a wire rack. Once cooled, lift them out using the parchment overhang and slice into squares.