Round-grain rice varieties are ideal for making rice pudding. The grain should be large and round in order to absorb as much milk as possible. You should not wash the rice pudding before cooking because of the starch content, which causes the rice grains to stick together. Arborio rice is one of the most well-known rice types of rice pudding. Its grain is the largest and most round, making it ideal for classic rice pudding. It absorbs milk without becoming mushy, does not clump, and retains a good bite due to its size. It can also be used for risotto dishes due to its high quality.