condiment

US /ˈkɑːn.də.mənt/
UK /ˈkɑːn.də.mənt/
"condiment" picture
1.

a substance such as salt, mustard, or ketchup that is used to add flavor to food

:
Pass the condiments, please; I'd like some ketchup for my fries.
Mustard is a popular condiment for hot dogs.