Zucchini Fritters

Name: Zucchini Fritters
Ingredients: ½ cup sour cream; ½ teaspoon kosher salt; ¼ teaspoon black pepper; ¼ teaspoon garlic salt; ⅛ teaspoon cayenne pepper; 2 medium zucchinis, (about 4 cups, grated); ½ small yellow onion (grated); 1 can (15.25 ounces) sweet corn, (drained); 1 teaspoon garlic (minced); ½ cup mozzarella cheese, (shredded); 2 large eggs, (room temperature); 1 ½ cups all-purpose flour; 1 teaspoon kosher salt; ½ teaspoon black pepper; ½ teaspoon baking powder; 2 tablespoons olive oil, (for frying (plus more as needed))