Aaplo kaunsi mithaian chaheye?
This answer is in the every day Hindi. In the chaste Hindi, it will be "Aapko kaunse mishthan chaheye?". The question has made it clear that the reference is to sweet meats as a food group. However, in the West, the sweet meats of Indian kind are not used. Instead, the hard boiled sugars,i.e., candies, etc. are used. In Hindi, they will be "golian" in place of "mithaian". Of course sweets like cake, chocolates will be named as such as there are no Hindi equivalents.
No references for a simple sentence like this.