To prevent kozhukattai from hardening after cooling, brush them with a little oil or ghee immediately after steaming and store them in an airtight container.
Kozhukattai tends to dry out because the rice flour loses moisture as it cools. Here's a step-by-step guide to keeping them soft:
After Steaming: Once the kozhukattai are steamed and still hot, gently brush them with a thin layer of oil or ghee. This creates a barrier that helps retain moisture.
Cooling Process: Allow the kozhukattai to cool slightly, but not completely, before storing them.
Storage: The most important step is to store the kozhukattai in an airtight container. This prevents air from drying them out. If you have a lot of kozhukattai, you can layer them in the container with parchment paper between the layers to prevent sticking.
Reheating (if needed): If you need to reheat them, lightly steam them again for a few minutes or microwave them with a damp paper towel to reintroduce moisture.
Don't overcook the kozhukattai during the steaming process. Over-steaming can also contribute to them becoming hard later on. Steam until they are just cooked through and slightly firm to the touch.