This is the 3170th most frequent French word.
quels
"Quels" means "which" or "what" (masculine plural).
In this sentence, 'quels' helps inquire about the set of items required for the recipe.
Quels sont les ingrédients pour cette recette ?
What are the ingredients for this recipe?
'Quels' is used to question about particular films, implying the asker is looking for a selection or list.
Tu as vu quels films récemment ?
What movies have you seen recently?
Here, 'quels' is used as an interrogative determinative to ask about specific books.