De or het topping?

The correct Dutch article is:

de topping

  • Plural: de toppings
Rule Words ending in -ing: almost always de. See the rule
Meaning (Dutch) 1. garneersel voor eten (pizza, salade, ijs) 2. het toppen (van struiken of bomen)

How to use topping

the toppingde topping
this toppingdeze topping
that toppingdie topping
our toppingonze topping
your toppingjouw topping
every toppingelke topping
which topping?welke topping?
a big topping / the big toppingeen grote topping, de grote topping
the topping (plural)de toppings, deze toppings

Dutch words ending in topping

pizzatopping | aftopping | stopping | opstopping | verkeersopstopping | verstopping

In compound words, the last part decides the article. See the rule

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).