According to the question La différence entre "en" et "y", I have another question:
Is it possible that we use "en" and "y" in one sentence? For example in the below sentence can we replace "de sucre" with "en" and "dans le gâteau" with "y"? (both of them). If yes, what's the order of these pronouns?
Combien de sucre je mets dans le gâteau?