Prepare the dish:
Lightly coat a microwave or oven-safe dish with non-stick cooking spray.

Mix ingredients:
In a medium bowl, combine the Greek yogurt, cocoa powder, sweetener, baking powder, protein powder, and water. Stir until the mixture is smooth and well blended.

Cook:
Microwave the mixture for 40–45 seconds. Remove and stir the brownie batter briefly. Microwave again for 20–30 seconds, watching closely to keep the texture gooey and moist. Alternatively, bake in a preheated oven at 350°F (176°C) for 15–20 minutes.

Serving Information:
Prep Time: 5 minutes
Cook Time: 1 minute (microwave) or 15–20 minutes (oven)
Total Time: 6 minutes (microwave) or 25 minutes (oven)
Servings: 1 brownie