in shara karba near national/jumbo showroom there are 2 shops adjacent to each oder caled delhi sweet shop and bombay sweet shop..
they have been there for ages now and every festival ppl buy sweets mainly from them as they make fresh stuff and dont keep it for long...
i suggest u try out these places as i have personally tried them out and u wont get better tasting and fresh indian sweets any where in doha
hope this helps:)