Description
Learn the best way to cook onions sweet by mastering the technique for perfect caramelized onions. This staple recipe yields deep flavor onions perfect for gourmet onion side dishes, French onion pasta sauce, or savory sweet onion toppings.
Ingredients
Scale
- 4 large yellow onions, thinly sliced
- 2 tablespoons unsalted butter
- 1 tablespoon olive oil
- 1 teaspoon salt
- 1 teaspoon granulated sugar (optional, for faster browning)
- 1/4 cup water or low-sodium vegetable broth (for deglazing)
Instructions
- Prepare the Onions: Peel and slice the onions thinly and uniformly. Uniform slices help them cook evenly.
- Start the Heat: Place a large, heavy-bottomed skillet over medium-low heat. Add the butter and olive oil. Wait until the butter melts completely.
- Initial Cook: Add all the sliced onions to the skillet. Stir to coat them evenly with the fat. Add the salt. Cook, stirring occasionally, for about 10 to 15 minutes until the onions soften and become translucent. This step draws out moisture.
- Begin Caramelization: Reduce the heat to low. Continue cooking, stirring every 5 to 8 minutes. The onions will start to turn pale gold. This slow cooking process develops the deep flavor onions you want.
- Add Sugar (Optional): If you want a slightly quicker result or extra sweetness, sprinkle the teaspoon of sugar over the onions after they have cooked for 30 minutes. Stir well.
- Deglaze and Scrape: After about 40 minutes total, the onions will start sticking to the bottom of the pan and turning brown. Add 1/4 cup of water or broth to the pan. Use a wooden spoon to scrape up all the browned bits (fond) from the bottom. This fond is pure flavor.
- Continue Cooking: Let the liquid evaporate, then continue cooking on low heat, stirring frequently. Repeat the deglazing process with a tablespoon of water if the onions stick too much before they reach the desired deep, rich brown color.
- Finish: Cook until the onions are deep mahogany brown, sticky, and sweet. This usually takes 45 to 60 minutes total, depending on your heat control. Remove from heat and use immediately or store.
Notes
- For a quick onion hack, use a higher heat initially, but watch closely to prevent burning. You must deglaze often when using higher heat.
- These caramelized onions are excellent as a base for creamy onion pasta ingredient or as a topping for burgers.
- For a vegan caramelized onion recipe, use only olive oil instead of butter.
- To make homemade onion jam, add 1/4 cup of balsamic vinegar during the last 10 minutes of cooking.
- Prep Time: 10 min
- Cook Time: 50 min
- Category: Side Dish
- Method: Stovetop Slow Cooking
- Cuisine: General
Nutrition
- Serving Size: 1/4 cup
- Calories: 75
- Sugar: 8
- Sodium: 290
- Fat: 4
- Saturated Fat: 1.5
- Unsaturated Fat: 2.5
- Trans Fat: 0
- Carbohydrates: 9
- Fiber: 1.5
- Protein: 1
- Cholesterol: 5