Preheat oven to 350°F (175°C). Line an 8×8-inch pan with parchment paper.
Whisk Greek yogurt, applesauce, and eggs until smooth.
Sift in cocoa powder and almond flour. Stir until just combined.
Spread batter in the prepared pan and bake 20–25 minutes.
Cool completely before slicing into 9 brownies.
