How to Cut an Onion

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    Learn how to cut an onion the easy way! This simple tutorial will leave you with perfectly sliced or diced onion in just a matter of minutes. 

    I’ll admit that cutting an onion used to take me quite a bit of time. I was always left with uneven pieces and would sometimes have to chop them a second time. But once I learned this easy method, that all changed. This really is the best way to cut an onion!

    cutting onions on cutting board

    Onions are in so many recipes. Whether you’re making a side dish, dip, soup, salad or main dish, there’s a good chance onions are included. They’re commonly used as an aromatic and give dishes that extra oomph in flavor.

    When an onion is included on the ingredient list, that means there’s chopping involved. Which for some, seems like a chore. But not with this easy method! It literally takes 5 minutes and the onion is evenly sliced or diced every time.

    cutting the ends of an onion

    How to dice an onion

    Diced onion is great for adding flavor to main dishes, soups and fresh dips like pico de gallo. I love this method because you’ll end up with similar sized pieces each time. Plus it’s super quick and takes just 5 minutes to perfectly peel and dice a whole onion.

    Peel and slice in half. Start by cutting both ends off the onion. Then sit it up vertically on one of the flat ends that you cut. Slice the onion in half, right down the middle. Then remove the peel from both sides. Lay each half on the cutting board, center side down.

    cutting an onion in half

    Make vertical and horizontal cuts. Carefully place one hand at the top of the onion half and your knife at the bottom. Slice into the onion horizontally, but don’t cut all the way through. You want the knife to almost reach the other end, but stop before it does. Make about 3-5 of these horizontal slices.

    Then use the same technique to make vertical slices down the onion, stopping before you cut all the way through.

    dicing an onion with a knife

    Dice into pieces. Now it’s time to dice the onion. Start at one of the sides and use your knife to make vertical slices all the way to the other side. As you slice, it will dice into pieces.

    dicing onions on cutting board

    How to slice an onion

    Sliced onion is great for fajitas, salads or to make roasted veggies in the oven. This is my favorite way to slice an onion because the slices are long, thin and all similar in size, meaning they’ll cook evenly and quickly. Plus the slices look extra pretty when garnishing a dish!

    1. Start by cutting both ends off the onion. Then sit it up vertically on one of the flat ends that you cut.
    2. Slice the onion in half, right down the middle. Then remove the peel from both sides.
    3. Lay each half on the cutting board, center side down. Start at one of the sides and use your knife to make vertical slices all the way to the other side. The width in between each slice will determine how thick or thin they are. I prefer mine on the thinner side.

    slicing onions

    How to freeze onions

    I don’t know about you, but whenever I go through the work of cutting an onion, I always make sure to dice extra so that I can freeze for later. It’s perfect for adding to soups and meats.

    1. Add the chopped onion to a freezer bag and seal the air out.
    2. Write the date on the bag, or add a freezer label.
    3. Store in the freezer for up to 3 to 6 months.

    freezing onions in a bag

    Ways to use

    There is an endless amount of ways to use chopped onions. You can enjoy them sauteed, roasted, pickled, caramelized or even raw for extra flavor and crunch. Below are some of our favorite ways to use them:

    slicing onions

    How to Cut an Onion

    Course: Main Dish
    Cuisine: American
    Keyword: how to cut an onion
    Prep Time: 5 minutes
    Total Time: 5 minutes
    Author: Jamielyn Nye
    Learn how to cut an onion the easy way! This simple tutorial will leave you with perfectly sliced or diced onion in just a matter of minutes. 

    Materials

    • 1 onion

    Instructions

    • Cut both ends off the onion. Then sit it up vertically on one of the flat ends that you cut off.
    • Slice the onion in half, right down the middle. Then remove the peel and lay each half on the cutting board, center side down.
    • Dicing: Carefully place one hand at the top of the onion half and your knife at the bottom. Slice horizontally into the onion but don’t cut all the way through. You want the knife to almost reach the other end, but stop before it does. Make about 3-5 of these horizontal slices. Use the same technique to make vertical slices down the onion (stop before you cut all the way through). Then start at one of the sides and make vertical slices all the way to the other side. The onion will dice into pieces as you slice.
    • Slicing: Start at one of the sides and use your knife to make vertical slices all the way to the other side. The width in between each slice will determine how thick or thin they are. I prefer mine on the thinner side.

    Notes

    To freeze: Add to a freezer bag and seal the air out. Then store in the freezer for about 3 to 6 months.
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