Silkworm pupae are the transitional stage from silkworm babies into silkworm moths, nutritious and delicious, but the shells of silkworm pupae are relatively hard, and it takes a certain amount of time to cook them. If you use boiling water to cook silkworm pupae, generally need to cook 10-15 minutes or so, until the shell of the silkworm pupae become soft, the internal cooked. If you use a steamer to steam the pupae, generally need to steam for about 15-20 minutes, again until the shell of the pupa becomes soft, the internal cooked.