In a small bowl, gently combine the creamy peanut butter, egg, unsweetened cocoa powder, a pinch of salt, sweetener (if you're using it), and 1 tablespoon of the chocolate chips. Stir everything together until it's well mixed and smooth.
If your batter seems a bit too thick, add 1-2 teaspoons of water, one tiny bit at a time, until it's easy to stir but still holds its shape—not too runny!
Preheat your mini waffle maker according to its instructions. For perfect non-stick results, you can lightly spray it with a bit of oil once it's hot.
Spoon about half of your delicious brownie batter into the hot waffle iron. Sprinkle half of the *remaining* chocolate chips on top. Close the lid and let it cook for about 2-3 minutes, or until you see no more steam coming out. This means it's perfectly done!
Carefully take out the first waffle. Repeat the cooking process with the rest of the batter and the final sprinkle of chocolate chips to make your second healthy brownie waffle.
Serve your warm, chocolatey waffles immediately, perhaps with a dollop of sugar-free whipped cream or a drizzle of low-carb syrup for a truly healthy and satisfying treat!