How to chop onions

Step 1: Place the Onion on Its Flat Side

Place the flat side of the onion down to keep it from slipping.

Step 2: Make Several Horizontal Cuts

Place your palm on the rounded side of one of the onion halves. Working carefully, hold the blade of your knife parallel to the cutting board and make several parallel horizontal cuts through the side of the onion, stopping right before the root end. Ideally, these cuts should be spaced 1/4 inch apart.

Step 3: Make Vertical Slices Across the Onion

Make vertical parallel slices evenly across the onion. Don't cut through the root; it helps hold the onion together as you chop. Ideally, these cuts should also be 1/4 inch apart.

Step 4: Make Vertical Crosswise Slices

Turn the onion 90 degrees, then make vertical crosswise slices. Try to make evenly sized cuts across so the diced onion is all the same size. Once you're done cutting, discard the root end.