Green onions and scallions are the same thing, and both ends of them are usable. The white base is dense and sharp and behaves like a mild onion, so it wants heat. The green tops are grassy and delicate and go in at the very end or raw.
That split is the whole reason people ask which part to cut. You are not choosing one, you are separating them and using them at different moments.
This guide covers trimming, the straight slice, the bias cut that gives you longer pieces for noodles and stir-fry, the fine shred for garnish, and what to do with the roots.
What You'll Need
- Sharp chef's knife: Scallion greens are hollow and thin-walled, and a dull blade crushes them flat instead of slicing, which is why garnish sometimes looks bruised.
- Stable cutting board: Scallions roll, and they are small enough that your guiding hand ends up close to the blade. A ROO Mat under the board keeps the surface from shifting while you work through a bunch, and the pouch takes the root ends and any slimy outer layer straight off the board.
- A bowl of cold water: Optional, for crisping shredded greens into curls and for rinsing grit out of the base, where soil collects.
How to Cut Green Onions (Scallions), Step by Step
Rinse and peel off the outer layer
Grit hides in the layers at the white end. Rinse the whole bunch under cold water and strip off the outermost layer if it is slimy or bruised, the way you would with a leek.
Trim the roots and the dried tips
Cut the hairy root cluster off just above where the roots start, keeping as much white as you can. Trim any dried or yellowed ends off the greens.
Separate the white from the green
Run your eye up the stalk to where the pale white shades into green. Cut there. Keep the two piles separate, because they go into the dish at different times.
Line up the stalks and slice
Gather several stalks parallel to each other, hold them together with a claw grip, and cut straight across at whatever thickness you want. Doing a handful at a time is faster and gives more even pieces than one at a time.
Bias-cut for longer pieces
For stir-fries, ramen, and anything where you want the pieces to read as a shape rather than a sprinkle, angle the blade about 45 degrees to the stalk and slice. The longer oval pieces show more surface and look deliberate.
Shred the greens for a fine garnish
Cut a length of green into two-inch segments, slit each one open lengthwise, lay it flat, and slice into fine threads with the knife almost parallel to the board. Drop the threads into ice water for ten minutes and they curl.
Add the whites early and the greens late
Whites go in with the aromatics and take a few minutes of heat to lose their bite. Greens go in off the heat or in the last thirty seconds, or they turn olive and lose their point.
Photo by Eva Bronzini on Pexels
Upgrade Your Prep: Get the ROO Bundle
ROO is a silicone mat that sits under your cutting board. It grips smooth countertops so the board never slides, and its built-in 7-cup pouch catches peels and trimmings as you cut. The Bundle includes the mat, a rubberwood board, and a reusable storage bag. $54.99.
Shop the ROO Bundle →Common Mistakes to Avoid
The whites are the part with actual onion flavor. If a recipe just says green onion and you use only the tops, the dish tastes like grass rather than allium.
Green tops collapse in under a minute of heat. Cooked from the start they go dull khaki and taste like nothing.
Slower and less consistent. Line up four or five and cut them together with a claw grip.
Soil packs into the layers at the base of the white, the same way it does in leeks. It does not wash out after you have already sliced it.
Upgrade Your Prep Workflow: The ROO Bundle
A bunch of scallions produces a surprising volume of waste for something so small: root clusters, slimy outer layers, and dried tips, all of which end up shoved to the corner of the board. The ROO Mat sits under your board and holds it steady while you work through the bunch, and its built-in 7-cup pouch takes the trimmings off the board edge as you go. The Bundle adds a 13.75" x 9.75" rubberwood board and a reusable storage bag.
Upgrade Your Prep Workflow: Get the ROO Bundle
Trimmings off the board, board off the counter's slippery spots.
Check out the ROO Bundle →Related Reading
Frequently Asked Questions
Which part of the green onion do you cut off?
Only the hairy root cluster at the very bottom and any dried or yellowed tips. Everything between those two points is usable.
Do you use the white or green part of a green onion?
Both, at different times. The white is stronger and needs cooking, the green is mild and goes in at the end or raw as garnish.
What is the difference between green onions, scallions, and spring onions?
Green onions and scallions are the same thing. A spring onion is harvested later and has a small rounded bulb at the base, which is sweeter and needs slightly longer cooking.
How do you cut green onions on a bias?
Angle the blade about 45 degrees to the stalk instead of cutting straight across. You get longer oval slices, which is the standard cut for stir-fries and noodle bowls.
Can you regrow green onions from the roots?
Yes. Stand the trimmed root ends upright in an inch of water in a glass, keep them in light, and change the water every couple of days. You get a usable second cutting of greens in about a week.
Split the whites from the greens, cut them the way the dish needs them, straight for a sprinkle and on the bias for length, and add them at two different moments. Then put the roots in a glass of water instead of the bin.