If you're looking for a substitute for Gruyère, several other kinds of cheese have a similar flavor profile. American Swiss is one obvious option, as mentioned above. This is a simple choice if you're making an Americanized Croque monsieur. Emmental is the best substitute if you're making fondue, as this AOP is a traditional pick for this purpose. Emmental is made with the same bacteria as Gruyère, giving it very similar flavor and properties. If you prefer a stronger flavor profile, an Irish Dubliner is another satisfying substitute. This cheese melts easily and has a nutty flavor with a hint of sweetness. For a milder alternative to Gruyère, try Jarlsberg cheese. This Norwegian variety has a sweet, nutty flavor that's not as strong as Gruyère. You can order Gruyère and other types of cheese easily through Instacart. Same-day delivery brings the groceries you need to your door without a trip to the store!