01 - Preheat the oven to 350°F. Grease an 8x8-inch baking pan or line with parchment paper.
02 - Whisk together almond flour, cocoa powder, baking powder, and salt 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 - Fold the dry mixture into the wet ingredients until just combined.
05 - Gently fold in the dark chocolate chips and nuts if using.
06 - Pour the batter into the prepared pan and smooth the surface evenly.
07 - Bake for 23 to 26 minutes until the center is set but moist crumbs cling to a toothpick.
08 - Allow the brownies to cool completely in the pan before cutting into squares.