"你最喜欢的甜点是什么？"

Translation: What is your favorite dessert?

[Shingod]

"What dessert is your favorite" should be correct.

[MelvinBret]

"Which dessert is your favorite?" should also be accepted

[R7fi9dwS]

I agree.

[Wadafik]

what is the dessert you like the most?

should be correct too right?

[SJHan2]

Right

[PetiteMika]

can i say 甜点 as 'Sweets'?

[Omayra-123]

What is your most favourite dessert? Wasn't accepted!

[mitchoboe]

It says "最". In other cases in this course, if you don't translate "最" it was wrong. Why then is it wrong now? This translation should be perfectly acceptable.

[dagummace]

What dessert do you prefer

[andre.rosete]

"What is your favorite kind of dessert?" should be correct.

[Christine.B.24]

Duolingo is usually pretty lenient with spelling errors, but I guess 'what is your favourite desert' is a question in its own right. I think it might be the Sahara...