01 - Preheat 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 dry ingredients into wet mixture until just combined, avoiding overmixing.
05 - Gently fold in chocolate chips and nuts if desired.
06 - Pour batter into prepared pan and smooth the surface evenly.
07 - Bake for 23 to 26 minutes until center is set but still moist when tested with a toothpick.
08 - Allow brownies to cool completely in pan before slicing into 16 squares.