Prepare the mixture:
Finely chop or grate the onion. In a large bowl, combine the grated zucchini, potatoes, and onion. Add the eggs, crème fraîche, salt, pepper, flour, and baking powder. Mix well until smooth.
Fry the pancakes:
Heat a pan with a little oil over medium heat. Using a spoon, form small round pancakes and brown them on both sides, about 3 to 4 minutes per side.
Serving:
Once cooked, place them on paper towels or napkins to drain excess fat. They are best served warm, with sour cream, yogurt, or your favorite sauce.
Enjoy your food!