Preheat oven to 350°F (175°C)
Line a square baking pan with parchment paper
In a bowl mash the avocado until completely smooth
Add eggs, sweetener, and vanilla extract
Mix until the batter becomes creamy
Stir in cocoa powder and almond flour
Add baking powder and salt
Mix until a thick brownie batter forms
Fold in sugar-free chocolate chips if using
Pour batter into the prepared baking pan
Spread evenly with a spatula
Bake until the brownies are set in the center
Allow brownies to cool completely before slicing
