Store gajar halwa in the refrigerator for up to two weeks (14 to 15 days). Please do not keep it out at room temperature for more than two days. It won't remain fresh. To reheat, microwave for 30 seconds or heat directly on the stovetop on low heat until warmed. I love to build on recipes so I can serve my family various desserts. I have prepared something special using carrot halwa - Carrot Halwa Cake - Don't forget to check this out. This a perfect baking recipe for this holiday or Christmas.