Trim the stem ends of the Brussels sprouts
Remove any yellow or damaged outer leaves
Rinse the Brussels sprouts under cold water
Bring a large pot of salted water to a boil
Prepare a bowl of ice water
Add the Brussels sprouts to the boiling water
Blanch small sprouts for 3 minutes
Blanch medium sprouts for 4 minutes
Blanch large sprouts for 5 minutes
Drain the Brussels sprouts immediately
Transfer them to the ice water
Leave them in the ice water for the same amount of time they were boiled
Drain well
Pat dry before using or storing