You can bring the best quality of Indian spices - cardamom, cloves, cinnamon etc. What most people would ask me to bring whenever I travel to Kerala is "Banana chips". These thinly slices dried bananas deep-fried in coconut oil is a delicacy that can travel with you back to your home easily. Besides I highly recommend buying Kerala cotton or Kerala silk sari. You can also buy "Mundu" for men in the same material. The white saris or mundu with golden border is a specialty.