* Gherkin-pickle-sauce (combining three food words)
* Macadamia-nut-butter (combining two food words)
* Fruit-salad-dressing (combining three food words)
* Sweet-potato-pie-crust (combining three food words)
* Chocolate-mousse-topping (combining three food words)
These are technically 5-syllable words, even if they are combinations of other food words.
For true single-word examples, it's more common to find 4-syllable words like "bananas," "spaghetti," and "chocolate." Let me know if you'd like more 4-syllable food words!