Description
This Easy Caramelized Mushrooms and Onion recipe is a delicious side or condiment to a variety of dishes. And we have a foolproof method for caramelizing onions and mushrooms that is as easy as it is consistent!
Ingredients
Units
Scale
- 1 large (about 1 lb.) sweet onion, thinly sliced (about 5 cups)
- 3 Tbsp. olive oil, divided
- 1 lb. cremini mushrooms, cleaned and sliced (about 6 cups)
- 1/2 tsp. table salt
- 1 Tbsp. unsalted butter
- 1 1/2 tsp. fresh thyme leaves
Instructions
- Add sliced onions and 2 tablespoons of the oil to a large heavy-bottom skillet or cast iron skillet. Heat skillet over medium-high. Once hot, stir onions and sprinkle with salt, cover and reduce heat to medium. Cook until the onions are golden brown, about 15 minutes, stirring a couple times through the cooking process and adjusting heat down to medium-low if the pan starts to scorch.
- Remove cover and move onions to the sides of the skillet. Add remaining 1 tablespoon oil to the center of the skillet and add a handful of the mushrooms in a single layer to the center of the skillet. Cook, undisturbed, until seared, about 3 minutes. Stir mushrooms into onions then move the mixture to the edges and sear more mushrooms in a single layer. Repeat this process with remaining mushrooms.
- Remove skillet from heat and add butter and thyme and stir until butter melts into vegetables. Serve hot or cool to room temperature and store in an airtight container in the refrigerator for up to 3 days.
Notes
- You can also use white button mushrooms.
- Can’t find sweet onions? Try using 1 pound of yellow onions.
- Want to add more flavor? Add a minced garlic clove at the end of the cooking process, or add a splash of Worcestershire sauce or soy sauce.
- You may freeze leftovers in a freezer-safe zip-top bag for up to 3 months.
- Prep Time: 5 min.
- Cook Time: 30 min.
- Category: Sides
- Method: caramelizing
- Cuisine: American