Preheat your oven to 350°F (175°C).
Prepare an 8-inch square baking pan by greasing or lining it with parchment paper.
In a large mixing bowl, mash the avocados until completely smooth.
Whisk in the sugar and eggs until well combined.
Add the cocoa powder, vanilla extract, salt, and baking powder; mix well.
Fold in the flour gently until just combined.
Pour the batter into the prepared pan and smooth the top.
Bake for 25 to 30 minutes, or until a toothpick comes out with a few moist crumbs.
Let the brownies cool completely in the pan before cutting.
Enjoy your delicious avocado brownies!