Prepare the Zucchini: Grate the zucchinis and squeeze out the excess moisture using a clean kitchen towel or cheesecloth.
- Mix the Ingredients: In a large bowl, combine the grated zucchini, corn kernels, flour, Parmesan cheese (if using), eggs, parsley, garlic powder, onion powder, salt, and pepper. Stir until well combined.
- Heat the Oil: Heat 1 tablespoon of olive oil in a skillet over medium heat. Add more oil as needed while frying.
- Form the Fritters: Scoop 2 tablespoons of the fritter mixture and form it into a patty. Place the patty in the hot skillet and flatten with a spatula. Repeat for the remaining mixture.
- Cook the Fritters: Fry for 3-4 minutes per side or until golden brown and crispy. Flip carefully to avoid breaking the fritters.
- Drain and Serve: Place cooked fritters on a paper towel-lined plate to drain excess oil. Serve warm, garnished with parsley if desired.