Bring a large pot of water to a boil. Fill a large bowl or sink with ice water.

Wash and trim the broccoli. Cut into even pieces, 2-3" in diameter.

Drop the broccoli into the hot water, return to a boil, and cook for 2-3 minutes.

Use a slotted spoon to move the broccoli to the ice water to cool.

Drain the broccoli, pat dry, and spread the pieces out in a single layer on a baking sheet. Freeze until solid.

Transfer frozen broccoli to freezer bags or containers.