01 - Preheat oven to 350°F. Line an 8x8-inch baking pan with parchment paper, allowing some overhang for easier removal.
02 - Whisk together all-purpose flour, unsweetened cocoa powder, baking powder, and sea salt in a medium bowl until evenly blended.
03 - In a large mixing bowl, blend nut-milk pulp, granulated sugar, melted coconut oil or unsalted butter, eggs, and pure vanilla extract until smooth.
04 - Gradually fold dry ingredients into wet mixture, gently stirring until just combined. Avoid overmixing to maintain a tender texture.
05 - Stir in dark chocolate chips or chopped chocolate, and chopped nuts if desired, ensuring even distribution throughout the batter.
06 - Spread brownie batter evenly into the prepared pan, smoothing the surface with a spatula.
07 - Place pan in the preheated oven and bake for 28 to 32 minutes, or until a toothpick inserted into the center yields a few moist crumbs.
08 - Allow brownies to cool completely in the pan before lifting out and slicing into squares.