01 - Preheat oven to 350°F. Line an 8-inch square baking pan with parchment paper, allowing overhang on sides for easy removal.
02 - In a medium bowl, whisk together almond flour, cocoa powder, baking powder, and salt until thoroughly blended.
03 - In a large bowl, whisk sugar and melted butter until smooth. Add eggs and vanilla extract, whisking until fully incorporated and glossy.
04 - Add dry ingredients to wet mixture. Stir gently with a spatula until just combined, being careful not to overmix.
05 - Gently fold in chocolate chips and nuts if using, distributing evenly throughout the batter.
06 - Transfer batter to prepared pan, spreading evenly into corners with an offset spatula.
07 - Bake for 22-25 minutes until center is just set and a toothpick inserted comes out with moist crumbs, not wet batter.
08 - Let brownies cool completely in the pan. Using parchment overhang, lift out and cut into 16 equal squares.