To make it spicier, add chopped jalapeños or a pinch of cayenne pepper to the batter.
Substitute mozzarella or a Mexican cheese blend for cheddar if desired.
For a lower-carb version, use almond flour instead of all-purpose flour.
For a vegan option, use your favorite plant-based dairy and cheese substitutes. Replace eggs with flax eggs (1 tablespoon flaxseed meal + 2.5 tablespoons water per egg).
