Print

The BEST Slow Cooker Caramelized Onions Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

4.2 from 1 review

A simple and flavorful recipe for slow cooker caramelized onions, perfect for enhancing a wide variety of dishes with their rich, sweet, and deeply caramelized flavor. The low and slow cooking method brings out the natural sweetness of the onions without the need for constant attention.

  • Author: Chef
  • Prep Time: 15 minutes
  • Cook Time: 10 hours
  • Total Time: 10 hours 15 minutes
  • Yield: 6 servings
  • Category: Side Dish
  • Method: Slow Cooking
  • Cuisine: American

Ingredients

Ingredients

  • 8 yellow onions, thinly sliced
  • ¼ cup canola oil (or other neutral-flavored oil)
  • 1 teaspoon salt
  • ½ teaspoon brown sugar (optional)

Instructions

  1. Combine Ingredients: Place the thinly sliced onions, canola oil, salt, and optional brown sugar into the slow cooker. Stir thoroughly to evenly coat the onions with the oil and seasoning.
  2. Cook Slowly: Cover the slow cooker with its lid and cook the onions on the low setting for 10 hours. This slow cooking process allows the onions to caramelize slowly, developing a rich, sweet flavor and soft texture without needing to stir frequently.

Notes

  • Use a neutral oil like canola or vegetable oil to avoid altering the flavor of the onions.
  • Adding brown sugar is optional but helps enhance the sweetness and caramelization.
  • Do not lift the lid or stir the onions during cooking to maintain steady heat and moisture, ensuring perfect caramelization.
  • Great for topping burgers, steaks, pizzas, or mixing into sauces and soups.