Remove the tops and ends, and clean and chop celery in 1/2 inch to 1 inch pieces.
Set up a bowl full of ice water. Place a clean kitchen towel unfolded and flat on the counter.
Bring a large pot of water to a rolling boil.
Add chopped celery to the boiling water and boil for 3 minutes.
Once the time is up, strain the celery through a colander or scoop pieces out of the water with a slotted spoon and immediately add to the ice water for two minutes.
Strain again and set aside to drain.
Spread out on the clean towel and blot dry.
How to Freeze Celery
Line a rimmed baking sheet with parchment or a silpat.
Add the celery on the baking sheet without crowding the tray and place the tray in the freezer.
Freeze for two hours.
Break apart any clumps that have formed on the baking sheet and transfer to freezer-proof storage.
Notes
There is no need to thaw before adding to dishes.Store unblanched in the freezer for up to two months, or blanched for up to 12 months.