Decide how you’re using Fontinella: melting (bake/grill) or grating (topping/mix-ins), because that determines the closest texture match.
Choose your top pick from the table below, then substitute 1:1 by weight (or by amount) in the recipe.
If your swap is milder than Fontinella (Swiss/provolone), boost flavor with a pinch of salt, black pepper, or added herbs suited to the dish.
If your swap is sharper or funkier (cheddar/gruyère), reduce the amount by 10–25% first, then add more only if the dish still needs punch.
For grating: use finely shredded cheese to mimic Fontinella’s melt speed; for baking: shred to help it distribute evenly.