Begin by grating the zucchinis and placing them in a colander. Sprinkle with a little salt to help draw out the moisture. Allow to sit for about 10 minutes, then press gently to remove excess water.
In a large mixing bowl, combine the grated zucchini, sweet corn, all-purpose flour, cornmeal, eggs, cilantro, green onions, cumin, garlic powder, salt, and pepper. Mix until well combined.
Heat 1 tablespoon of olive oil in a non-stick skillet over medium heat.
Scoop about 1/4 cup of the fritter mixture into the skillet, flattening it slightly with the back of a spatula. Cook for 3-4 minutes on each side, or until golden brown.
Repeat with remaining mixture, adding more oil to the skillet as needed.
Once cooked, transfer fritters to a paper towel-lined plate to absorb excess oil.
Notes
Serve warm with sour cream or Greek yogurt and sliced avocado.