Can I mix this with just water, or do I need milk or another liquid?

You can prepare it with water, and this is a common method for a simple, low-calorie option that provides just the carbohydrates from the rice flour. Using water will result in a plainer taste, letting the vanilla flavor come through without added richness.

For a creamier texture and more substantial snack, many people use plant-based milks (like almond, oat, or soy milk) or regular milk if they are not avoiding lactose. Protein shakes are another popular liquid base, effectively turning the pudding into a thicker, higher-calorie post-workout drink. The key is to use a liquid that is at least cool, if not cold, and to mix vigorously or use a shaker bottle to prevent clumps, as the fine rice flour can stick together. Start with a smaller amount of liquid to create a thick paste, then gradually add more to reach your preferred consistency, whether you want a thick porridge or a drinkable shake.