Using a grater, grate the zucchini into a large colander set aside inside a bowl. Using your hands, squeeze the excess water out of the grated zucchini and drain.
Add eggs and cheese to the drained zucchini and mix. Add the coconut flour, garlic powder, red pepper flakes, and salt and mix.
Open the chaffle maker and grease the top and the bottom with coconut spray.
Using ⅓ measuring cup, scoop out some of the batter, place it in the center of the chaffle iron, and close the lid. Cook the chaffle about 4 mins, until golden brown and fully cooked through. Use a fork to lift it off the iron and set on a plate.
Repeat with the remaining batter, making a total of 4 chaffles, garnish with cheddar cheese and sour cream.