Perfectly Caramelized Onions
Burgers
Master the art of creating rich, jammy caramelized onions with this slow-cooked method, perfect for adding deep flavor to any burger.
Caramelized onions are the secret weapon of any great burger joint, providing a deep, sweet complexity that elevates simple ingredients. This process relies on patience, using low heat to patiently draw out natural sugars and moisture until the onions reach a dark, glossy, and perfectly sticky consistency.
Ingredients
- 400 g onion
- to taste butter
- to taste apple cider vinegar
- to taste black pepper
- 30 g brown sugar
- 30 g mature vinegar
Instructions
- 1Trim the onions
Take the peeled onion and use a sharp knife to cut off both ends on a wooden cutting board, then slice it down the middle. If you notice any tough or leathery outer layers during this process, make sure to discard them, as they will negatively affect the final texture of your burger topping.
Tip: Always remove the older, papery layers of the onion, as they wont soften properly during the caramelization process. - 2Slice the onions
Take the halved onion and slice it evenly into thin strips. Consistent slicing is important because it ensures that all the onion pieces cook at the same rate when placed on the hot griddle.
Tip: Aim for uniform slices to prevent some pieces from burning while others remain undercooked. - 3Grease the griddle
Turn on your griddle and set it to the highest temperature setting. Take a block of butter and spread it generously across the hot surface until it melts completely. Dont worry if it seems like a bit too much butter; the fat is necessary for the process.
Tip: If you dont have a flat-top griddle, a wide, heavy-bottomed cast iron skillet works perfectly for this method. - 4Add onions to the griddle
Place your thinly sliced onions directly onto the melted butter on the griddle. Spread them out evenly so they form a single layer and make good contact with the cooking surface, then begin to stir-fry.
Tip: Once the onions are on the griddle, lower the heat. Low heat is essential to slowly draw out the moisture without burning them. - 5Slow cook the onions
Spread the sliced onions evenly on the griddle and stir-fry them continuously over low heat using a spatula. The low heat will slowly draw out the natural moisture from the onions, allowing them to soften and develop a light brown color.
Tip: Keep the heat low at all times. The goal is to gently draw out the moisture without searing or burning the onions. - 6Add apple cider vinegar
Once the onions have turned brown and most of their moisture has evaporated, pour in an appropriate amount of apple cider vinegar. This will introduce a pleasant sweet and crisp flavor to balance the richness of the onions.
Tip: Do not add any other seasonings before this step to ensure the onions can brown properly first. - 7Season with black pepper
Use an electric grinder or a pepper mill to add a little black pepper over the onions. Stir well to incorporate the seasoning evenly throughout the mixture.
Tip: Freshly ground black pepper provides a sharper, more aromatic bite compared to pre-ground black pepper. - 8Add brown sugar and mature vinegar
Prepare 30 grams of brown sugar and 30 grams of mature vinegar. Pour both the brown sugar and the mature vinegar sequentially over the seasoned onions, then continue to stir-fry to combine.
Tip: Never use high heat during this stage, as the sugars will burn quickly and turn bitter.
