Blanch sugar snaps in a 3- to 4-quart saucepan of
boiling salted water, uncovered, until crisp-tender, about 2 minutes. Transfer sugar snaps with a slotted spoon to a bowl of ice and cold water to stop cooking. Keep cooking water at a boil. Once sugar snaps are cool, pat dry between paper towels. Cook baby peas in boiling water 5 minutes, then drain in a sieve and set sieve in ice water to stop cooking. Drain peas, then pat dry between paper towels.