Caramelized Onions and Mushrooms Recipe

Caramelized onions and mushrooms in a small white bowl.

Caramelized Onions and Mushrooms Recipe

Caramelized onions and mushrooms cook low and slow for a rich, melt-in-your-mouth result. This easy recipe upgrades any steak or sandwich, or enjoy it on its own as an easy side dish!

Course Condiment, Side Dish

Cuisine American

Diet Vegetarian

Prep Time 5

Cook Time 45

Total Time 50

Servings

Calories 143kcal

Ingredients

1 tablespoon olive oil
3 tablespoons butter divided
8 oz. sliced mushrooms cremini or baby bella
2 medium yellow onions
1/2 teaspoon kosher salt more to taste
1/2 teaspoon granulated sugar optional

Instructions

Prepare onions. Cut in half from root to end and peel off papery skin. Quarter and remove the core. Then slice in strips about 1/4" wide from root to end.
Preheat a sauté pan over medium high heat. Add olive oil and 1 tablespoon of butter until the butter is melted.
Add mushrooms in a single layer and sprinkle with salt. Cook for 2 minutes, then flip and cook an additional 2 minutes to get some brown on the edges of the mushrooms.
Lower the heat to medium low and add remaining butter and onions. Cook uncovered for about 45 minutes, stirring every 5 minutes or so, until onions are floppy, translucent, and caramel colored. Add a little butter or a small splash of water if the mixture starts looking dry or sticking, and lower the heat if necessary.
Deglaze with about 1/4 to 1/3 cup of water, scraping up any fond that has formed on the bottom of your pan. Add salt to taste and, if desired, a little sugar to bump up the sweetness a bit.
Enjoy with steak, on a sandwich or burger, or as a side dish. Store refrigerated in an airtight container for up to 4 days, or freeze in ice cube trays for up to 4 months for best flavor.

Nutrition