The Food Lab: Better Home Cooking Through Science

STEP 4: PEEL THE STALKS (optional) When using
celery for gently cooked preparations or in larger batons or
chunks, the fibrous skin on the outer surface can be
distracting. Using a vegetable peeler, peel each stalk by
holding the base against the cutting board and pulling the
peeler down the length with a smooth, even motion. Repeat
until the entire outer surface is clean.