 The most popular crab species used in this recipe is mud crab, however sometimes blue crab can also be used.The crabs are boiled in hot water until medium done and cut into pieces, the hot water being used in the boiling process will be used as crab broth.The "bumbu" ground spices mixture includes garlic, shallot, bird's eye pepper, ginger, turmeric, candlenut and red chili pepper.