Here are some options depending on the context:
If you want to express delight in the taste of something:
* "Délicieux!" (pronounced "deh-lee-syuh") - This is the most common and general way to express "delicious" in French.
* "Miam!" (pronounced "mee-am") - This is a playful and informal way to say "yum."
* "C'est bon!" (pronounced "say bohn") - This means "it's good" and is a more general way to express approval of something.
If you're trying to express the sound someone makes while enjoying something:
* "Mmmm!" (pronounced "mmm") - This is a universal sound for expressing pleasure in many languages, including French.
* "Hummm!" (pronounced "humm") - Another similar sound expressing pleasure.
Ultimately, the best option depends on the situation and how you want to express yourself.