Preheat your oven to 350°F (175°C). Prepare an 8×8-inch baking pan by lining it with parchment paper or lightly greasing it.
Blend 1 cup of cottage cheese until smooth.
In a bowl, whisk 2 large eggs until frothy. Add the blended cottage cheese, melted butter or coconut oil, and vanilla extract; mix until well combined.
In another bowl, sift together cocoa powder, flour, baking powder, and salt. Stir in brown sugar until evenly distributed.
Gently fold the wet and dry mixtures together until just combined. Avoid overmixing.
Fold in optional ingredients like chocolate chips, nuts, espresso powder, or protein powder.
Pour the brownie batter into the prepared pan and smooth the top.
Baking
Bake for 20–25 minutes. Check for doneness at 20 minutes with a toothpick.
Let the brownies cool in the pan for about 15 minutes, then lift them out using the parchment paper.
Let them cool completely on a wire rack, then slice and enjoy.
Notes
Store leftovers in an airtight container at room temperature for up to three days.
Freezes well.
Experiment with different flours for unique textures and flavors.