My personal favorite for the grill is red onions and sweet onions like the Vidalia and Maui. However, when cooked, these onions get much sweeter and tend to be the most flavorful and "oniony." Add in the butter, and cook until the butter begins to … Cut the onion in half and remove the outside shell. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. If they are sticking, they aren't ready to be flipped yet. These are great for the grill and great for caramelizing. White onions: These are the mildest of all the onions and tend to be universally appealing. The longer you leave the onions on the grilling surface, whether grilled or whole, the softer they will be. Once hot, add the onions and sprinkle with salt. Then cut into thin slices, the thinner the slices, the faster they will cook. Give the edge of one a taste test. If your grill surface has wide spaces between the wires, or if your onion slices are small enough to fall through, make a foil basket for the onion slices. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/2\/29\/Grill-Onions-Step-1-Version-2.jpg\/v4-460px-Grill-Onions-Step-1-Version-2.jpg","bigUrl":"\/images\/thumb\/2\/29\/Grill-Onions-Step-1-Version-2.jpg\/aid1354061-v4-728px-Grill-Onions-Step-1-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/4\/4d\/Grill-Onions-Step-2-Version-2.jpg\/v4-460px-Grill-Onions-Step-2-Version-2.jpg","bigUrl":"\/images\/thumb\/4\/4d\/Grill-Onions-Step-2-Version-2.jpg\/aid1354061-v4-728px-Grill-Onions-Step-2-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/c\/c3\/Grill-Onions-Step-3-Version-2.jpg\/v4-460px-Grill-Onions-Step-3-Version-2.jpg","bigUrl":"\/images\/thumb\/c\/c3\/Grill-Onions-Step-3-Version-2.jpg\/aid1354061-v4-728px-Grill-Onions-Step-3-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/67\/Grill-Onions-Step-4-Version-2.jpg\/v4-460px-Grill-Onions-Step-4-Version-2.jpg","bigUrl":"\/images\/thumb\/6\/67\/Grill-Onions-Step-4-Version-2.jpg\/aid1354061-v4-728px-Grill-Onions-Step-4-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/fd\/Grill-Onions-Step-5-Version-2.jpg\/v4-460px-Grill-Onions-Step-5-Version-2.jpg","bigUrl":"\/images\/thumb\/f\/fd\/Grill-Onions-Step-5-Version-2.jpg\/aid1354061-v4-728px-Grill-Onions-Step-5-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/0\/0e\/Grill-Onions-Step-6-Version-2.jpg\/v4-460px-Grill-Onions-Step-6-Version-2.jpg","bigUrl":"\/images\/thumb\/0\/0e\/Grill-Onions-Step-6-Version-2.jpg\/aid1354061-v4-728px-Grill-Onions-Step-6-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/fd\/Grill-Onions-Step-7-Version-2.jpg\/v4-460px-Grill-Onions-Step-7-Version-2.jpg","bigUrl":"\/images\/thumb\/f\/fd\/Grill-Onions-Step-7-Version-2.jpg\/aid1354061-v4-728px-Grill-Onions-Step-7-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/d\/de\/Grill-Onions-Step-8-Version-2.jpg\/v4-460px-Grill-Onions-Step-8-Version-2.jpg","bigUrl":"\/images\/thumb\/d\/de\/Grill-Onions-Step-8-Version-2.jpg\/aid1354061-v4-728px-Grill-Onions-Step-8-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a7\/Grill-Onions-Step-9-Version-2.jpg\/v4-460px-Grill-Onions-Step-9-Version-2.jpg","bigUrl":"\/images\/thumb\/a\/a7\/Grill-Onions-Step-9-Version-2.jpg\/aid1354061-v4-728px-Grill-Onions-Step-9-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/9\/95\/Grill-Onions-Step-10-Version-2.jpg\/v4-460px-Grill-Onions-Step-10-Version-2.jpg","bigUrl":"\/images\/thumb\/9\/95\/Grill-Onions-Step-10-Version-2.jpg\/aid1354061-v4-728px-Grill-Onions-Step-10-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/9\/92\/Grill-Onions-Step-11-Version-2.jpg\/v4-460px-Grill-Onions-Step-11-Version-2.jpg","bigUrl":"\/images\/thumb\/9\/92\/Grill-Onions-Step-11-Version-2.jpg\/aid1354061-v4-728px-Grill-Onions-Step-11-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/66\/Grill-Onions-Step-12-Version-2.jpg\/v4-460px-Grill-Onions-Step-12-Version-2.jpg","bigUrl":"\/images\/thumb\/6\/66\/Grill-Onions-Step-12-Version-2.jpg\/aid1354061-v4-728px-Grill-Onions-Step-12-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/2\/25\/Grill-Onions-Step-13.jpg\/v4-460px-Grill-Onions-Step-13.jpg","bigUrl":"\/images\/thumb\/2\/25\/Grill-Onions-Step-13.jpg\/aid1354061-v4-728px-Grill-Onions-Step-13.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/6d\/Grill-Onions-Step-14.jpg\/v4-460px-Grill-Onions-Step-14.jpg","bigUrl":"\/images\/thumb\/6\/6d\/Grill-Onions-Step-14.jpg\/aid1354061-v4-728px-Grill-Onions-Step-14.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

License: Fair Use<\/a> (screenshot)
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/1e\/Grill-Onions-Step-15.jpg\/v4-460px-Grill-Onions-Step-15.jpg","bigUrl":"\/images\/thumb\/1\/1e\/Grill-Onions-Step-15.jpg\/aid1354061-v4-728px-Grill-Onions-Step-15.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"