Slow Cooker Caramelized Onions are mellow, sweet, and versatile, too! Use them for everything from French onion soup to omelet fillings to burger toppings. With this simple, foolproof method, you can have caramelized onions on hand anytime!
Slice onions from pole to pole (root to stem), about 1/8"-1/4" inch thick.Cutting the onions this way prevents them from breaking down too much during cooking.
Fill Slow Cooker about 2/3 full of cut onions.
Drizzle in olive oil and toss to coat.
Cover slow cooker and set to LOW.
Cook for 10-18 hours, stirring every few hours if you are available. (It's also OK if you don't stir them at all.) This step is done when the onions are dark brown, soft, and swimming in a thick liquid. Image: Onions after 5 hours
When onions are medium brown, soft, and sweet, they are ready to use. Image: Onions after 8 hours
For thicker, jammier caramelized onions with deeper color, uncover the slow cooker and continue to cook onions on low for an additional 3-5 hours. Image: Onions after 22 hours
Caramelized onions may be used immediately, or refrigerated or frozen for later use.
Caramelized onions may. be kept in the refrigerator for up to a week, or frozen for up to six months.
This website provides approximate nutrition information for convenience and as a courtesy only. You are solely responsible for ensuring that any nutritional information provided is accurate, complete, and useful.