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Caramelized Onions and Mushrooms Recipe

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4 from 29 reviews

A savory and flavorful side dish featuring tender caramelized onions and baby bella mushrooms sautéed to perfection with olive oil, butter, and Worcestershire sauce, finished with fresh parsley for a hint of brightness. This quick and easy recipe brings out the natural sweetness of the onions and deep, earthy flavors of the mushrooms, ideal as a complement to any main course.

  • Total Time: 20 minutes
  • Yield: 4 servings

Ingredients

Mushrooms and Onions

  • 8 ounces baby bella mushrooms, sliced 1/4-1/2 inch thick (can substitute white mushrooms)
  • 1 medium onion, thinly sliced

Cooking Essentials

  • 1 1/2 tablespoons olive oil
  • 1 1/2 tablespoons butter
  • 1/2 teaspoon salt (or to taste)
  • 1/4 teaspoon pepper (or to taste)
  • 1 tablespoon Worcestershire sauce

Garnish

  • 2 tablespoons fresh parsley, finely chopped

Instructions

  1. Clean the Mushrooms: Lightly rinse the mushrooms to remove dirt using a spray nozzle or by quickly plunging them in a bowl of room temperature water. Immediately transfer the mushrooms to a clean cotton towel and dry them thoroughly to avoid excess moisture which impairs caramelization.
  2. Prepare Onions and Mushrooms: Peel and thinly slice the onion. After drying, slice the mushrooms between 1/4 to 1/2 inch thickness or to your preference.
  3. Heat Skillet with Oils: Over medium to medium-high heat, warm a large skillet and add olive oil and butter. Once the butter has melted and dispersed, it creates a flavorful base for cooking.
  4. Cook Mushrooms and Onions: Add the sliced mushrooms to the skillet in as close to a single layer as possible. Scatter the sliced onions evenly over the mushrooms. Let them sauté uncovered without stirring for about 3-4 minutes to allow for caramelization on the bottom.
  5. Season and Stir: When the bottoms turn golden brown, season with salt and pepper and add the Worcestershire sauce. Stir well to combine all the flavors.
  6. Finish Cooking: Reduce heat to medium-low or low, and continue cooking for an additional 3-5 minutes, stirring occasionally, until mushrooms reach the desired color and onions become tender.
  7. Serve: Taste for seasoning and adjust salt if needed. Remove from heat and garnish with freshly chopped parsley. Serve immediately for best flavor.

Notes

  • Dry mushrooms thoroughly after washing to prevent steaming and ensure proper caramelization.
  • You can substitute baby bella mushrooms with white button mushrooms if preferred.
  • Cooking time may vary depending on your stove and pan, so keep an eye to avoid burning.
  • Adding Worcestershire sauce adds umami depth; omit for vegetarian or vegan modification.
  • This dish pairs perfectly with grilled meats, roasted vegetables, or can be used as a topping for steaks or burgers.
  • Author: ELLA
  • Prep Time: 8 minutes
  • Cook Time: 12 minutes
  • Category: Side Dish
  • Method: Frying
  • Cuisine: American
  • Diet: Halal

Find it online: https://ellarecipe.com/caramelized-onions-and-mushrooms-recipe/