Learn Dutch: Hoeveel suiker wilt u in uw thee? - How much sugar do you want in your tea?

It means both! Dutch doesn't make a distinction between uncountable things (how much) and countable things (how many). You use hoeveel for both suiker (sugar) and appels (apples). It literally combines hoe (how) and veel (much or many).

Why does suiker come before the verb? Doesn't the verb have to be at the beginning of a question?

When you use a question word like hoeveel, the verb comes in the second position. The tricky part is that the whole phrase hoeveel suiker (how much sugar) acts as a single block of information in the first position. The verb wilt takes the second spot right after it.

If this is a question, why doesn't the verb wilt lose its -t ending?

When a verb and subject are swapped in a question, you drop the -t ending only for the informal 'you' (jij or je). Because this sentence uses the formal 'you' (u), the verb keeps its -t ending, just like it does in a normal statement.

What is the difference between u and uw in this sentence?