Tender and sweet Grilled Onions need to become a staple for you grilling going forward! They are simple to make and taste oh-so-good!
Grilled onions are the perfect complement to so many meals that you should just count on making them every time you grill. They only take a couple minutes to grill so they won’t hold up meals while you wait a long time for them to finish up. We serve these up with Cornish Hens, Cowboy Steaks or Caramelized Onion Chicken.
Look for a good, sweet onion. Hands down, the sweet varieties will caramelize and cook the best.
- Walla Walla Sweet Onion – I grew up in the Pacific Northwest and each summer, when these became available, we would buy quite a few for our cooking. They are wonderful. It is harder to find these out of season and out of the Northwest.
- Vidalia Onion – This is the most readily available onion on the market. It is quite common to find these at almost every grocery store.
- Maui Sweet Onion – As the name indicates, this onion variety is grown in Hawaii. It is definitely more difficult to get in mainland America, but definitely grab some if you get the opportunity. It is one of the sweetest onions in the world. You will find these under the “Kula-grown” trademark.
- Texas 1015 Onion – This is an extremely large and mild variety that is usually only available through special order. The size of these onions alone make them awesome for grilling.
💡 Recipe Tips
- Use Flat metal skewers. These are much easier to push through the center of an onion slice than round or wooden skewers.
- Brush both sides of the onion with the olive oil mixture to minimize the chances of sticking.
- Use the GrillGrate to get those beautiful charred lines
- If a slice is too thin, or you are not able to get the skewer through, place it on a non-stick copper mat and grill.
🔥 Grilling Instructions
Step One: Slice the onions into half inch slices, place the palm of your hand over the onion and carefully push the skewer through. Make sure not to slip and accidentally poke your hand.
Alternatively, you can stick the skewer through when the onion is whole, and then slice on either side of the skewer, but I thought that was more cumbersome than gently pushing it through after slicing.
Step Two: Mix two tablespoons of olive oil with a little bit of kosher salt and coarse ground pepper in a small bowl. Brush the olive oil mixture on the grilled onions. Always do this AFTER you put the onions on the skewer. If you try to do this before, the olive oil is too slippery and it is hard to keep a grip on the onion and you could end up poking yourself. Let’s not ask me how I know that, ok?
Note: Err on the side of cutting too thick. If you slice these too thin, they will be hard to get the skewer through and it will make it harder to turn them over on the grill.
Step Three: Grill these between 20 and 30 minutes. I set them on direct heat at 300 degrees for 10 minutes and then turned them over for another 10 minutes. The onions are done when they are golden brown and a bit soft to the touch. Don’t worry if the edges get a little charred. That part tastes the BEST!
Serve these Grilled Onions with steaks, chicken or pork! Top off a thick juicy burger with these grilled onions instead of using raw ones. Also mix these with any other veggie that you have and it makes a great combo.
Reverse Seared Cowboy Ribeye – This is a fun technique to grill a thick piece of red meat and works perfectly with the mild, sweet onions.
Smoked Chuck Roast – The smoky flavor of this roast works perfectly with grilled onions and you’ll love the combination!
Grilled Teriyaki Steak – This is a classic and the Teriyaki flavors work so well with a hot grill. Give it a shot!
- Flat Skewers
- 1 each Sweet Onion
- 1 tsp Olive Oil
- 1 pinch Black Pepper coarse ground
- 1 pinch Sea Salt
- Cut a sweet onion into 1/2" thick slices
- Hold the sliced onion flat on the cutting board with the palm of your hand and insert a flat metal skewer through the center of the onion. Be careful not to slip.
- Combine the olive oil, salt and pepper in a small bowl. Brush both sides of the onion with the olive oil mix.
- Set your grill for 300 degrees. Place the onions on the grating. Let them cook for about 10 minutes, or until they are golden brown on the bottom. Turn them over.
- Cook the other side of the sweet onion slice for another 10 minutes or until it is golden brown and slightly caramelized.
- Remove from the grill and serve as a side dish with grill steak or chicken.