Preheat Oven: Set your oven to 350°F (175°C) and grease an 8×8-inch baking pan.
Mix Dry Ingredients: In a bowl, combine almond flour, cocoa powder, baking powder, and salt.
Combine Wet Ingredients: In another bowl, whisk together eggs (or flax egg), applesauce (or melted butter), vanilla extract, and your sugar substitute.
Blend: Add the wet mixture to the dry ingredients and stir until fully combined.
Bake: Pour the batter into the prepared pan and bake for 20-25 minutes, or until a toothpick comes out clean.
Cool & Serve: Let the brownies cool before slicing and enjoying!