Rinse the green onions under running water, dry thoroughly and remove any wilted pieces or bad layers.
Cut off ¼ of an inch from both ends. Remove the fuzzy root end and the broken, tough green ends.
Locate the junction where the green parts begin to branch off from the white base. Make a cut at this point and use the green parts for garnish and the white parts for cooking.
For the green: Cut in a push-pull, or circular motion, slicing quickly to avoid breaking the delicate cylindrical shape. A very sharp knife helps make this part even easier! Cut perpendicular to the long axis of the onion to get perfectly round circles or cut at a bias, at an angle, to get more of an oval shape. You can also make thin cuts for garnish or longer cuts to add to stir-fries.
For the white: Cut the white part in the same manner as you did the green, in a push-pull circular motion, and use for cooking. It has a stronger flavor than the green that mellows out after it is exposed to heat.
Use them immediately, store green onions, or freeze green onions for later!