Begin by grating the zucchinis using a box grater. Place the grated zucchini in a clean kitchen towel and squeeze out as much excess moisture as possible. Transfer the dried zucchini to a mixing bowl.
In the same bowl, add salt to the zucchini, mixing well, and let it sit for about 5 minutes. This will help draw out more moisture.
After 5 minutes, add the flour, Parmesan cheese, eggs, parsley, garlic powder, onion powder, black pepper, and chopped green onions into the bowl with the zucchini. Mix thoroughly until all ingredients are evenly combined and a batter forms.
Heat vegetable oil in a large frying pan over medium-high heat. You want enough oil to cover the bottom of the pan, about 1/4 inch deep.
Once the oil is hot, scoop out about 2 tablespoons of the fritter mixture and gently place it in the pan. Use the back of a spatula to flatten it slightly. Repeat, making as many fritters as can fit in the pan without crowding.
Fry the fritters for about 3-4 minutes on each side, or until they are golden brown and crispy. Remove them from the oil and place them on a paper towel-lined plate to absorb excess oil.
Continue the frying process in batches until all the batter is used up. You can add more oil as necessary.
Notes
Serve with sour cream or Greek yogurt for added flavor.