01 - Preheat oven to 350°F. Line an 8x8-inch baking pan with parchment paper, ensuring overhang for easy removal.
02 - Combine flour, cocoa powder, baking powder, and sea salt in a medium bowl. Whisk until evenly blended.
03 - In a large bowl, mix nut-milk pulp, sugar, melted coconut oil or butter, eggs, and vanilla extract until smooth and homogeneous.
04 - Gradually fold dry ingredients into the wet mixture using a spatula, mixing gently until just combined. Avoid overmixing.
05 - Stir in chocolate chips or chopped chocolate, and incorporate nuts if desired.
06 - Pour batter into the prepared pan and use a spatula to level the top evenly.
07 - Bake for 28 to 32 minutes, or until a toothpick placed in the center emerges with a few moist crumbs.
08 - Allow brownies to cool completely in the pan before slicing into squares and serving.