Place the shelled broad beans in a colander and rinse them under cool water. Dispose of any damaged or discolored beans.
Fill a large pot with 1 gallon of water and set it on the stove burner. Fill a bowl with ice water and set it near the stove.
Heat the water in the pot to a full boil over medium-high heat.
Drop 1 pound of washed broad beans into the boiling water. Allow the water to return to a boil and boil the beans for four minutes.
Remove the broad beans from the water with a slotted spoon or strainer. Place the beans in the ice water and allow them to cool for at least four minutes.
Drain the ice water from the blanched beans. Serve the beans blanched, add them to other ingredients, or freeze them in a sealed container.