In a bowl, combine the egg, Greek yogurt, sweetener, cocoa powder, and chocolate protein powder. Stir until the batter is smooth and well blended. Then fold in the chocolate chips to your liking.

Lightly grease a small microwave-safe dish or ramekin to prevent sticking. Pour the batter evenly into the dish.

Cook the batter in the microwave for 90 seconds if you prefer a soft, lava cake texture, or for 120 seconds if you want a firmer, more traditional brownie consistency.

Remove carefully from the microwave. Add your favorite toppings such as nuts, berries, or a drizzle of nut butter, and dive into your warm, protein-packed brownie!