Pasta

Pasta is one of three x3 mutations handed out by the same pet, the Spaghetti Sloth; the other two are Sauce and Meatball. On its own it is modest: x3, #182 of 192, tied with Sauce, Vamp, Aromatic and Pollinated.

The interesting part is what it feeds. According to the wiki, combining Pasta, Sauce and Meatball produces Spaghetti at x15, five times any single ingredient. Spaghetti in turn is one of the three pieces of Gourmet, a x37 mutation that also needs Aromatic and Sizzled. So a crop that collects the Sloth's three mutations climbs from x3 to x15, and the chain can keep going from there. The Sloth is the only listed source, so Pasta, Sauce and Meatball all depend on that one pet. Each pays x3 on its own, and the recipe turns three x3 mutations into a single x15.