General:
* Scrumptious
* Appetizing
* Savory
* Mouthwatering
* Delectable
* Exquisite
* Superb
* Fantastic
* Wonderful
* Heavenly
Highlighting the flavor:
* Flavorful
* Tasteful
* Rich
* Zesty
* Spicy
* Tangy
* Sweet
* Savory
Highlighting the quality:
* Gourmet
* Fine
* Premium
* Exceptional
* Outstanding
More informal:
* Yummy
* Tasty
* Great
* Amazing
* Perfect
You can also use phrases like:
* A culinary masterpiece
* A feast for the senses
* A symphony of flavors
* A culinary delight
The best synonym will depend on the specific context and the feeling you want to evoke.