In a large bowl, stir together flour, baking powder, cumin, sugar, salt and pepper.
In a small bowl, whisk together eggs, milk, and butter. Whisk wet ingredients into dry ingredients. Stir in zucchini, corn, and cheese; mix well.
Heat the oil in a cast iron frypan on medium-high heat. Drop batter by the tablespoonful into hot oil. Fry until crisp and brown, turning once with tongs. Remove to paper towels.