topping
noun /ˈtɒpɪŋ/
  /ˈtɑːpɪŋ/
 [countable, uncountable]- a layer of food that you put on top of a dish, cake, etc. to add taste or to make it look nice- baked vegetables with a cheese topping
- The basic pizza is £6 and then each extra topping is 75p.
 Oxford Collocations DictionaryTopping is used after these nouns:- pizza