Learn how to make perfectly Sautéed Mushrooms and Onions to top steaks, burgers or to serve as a flavorful side. These step-by-step instructions will help you achieve restaurant-quality, never-soggy mushrooms and onions every time.
What makes mushrooms and onions from steakhouses so irresistible? It’s all about technique: high heat, the right pan, and timing. This guide shows you how to sauté mushrooms and onions like the pros so they develop deep browning and concentrated flavor—perfect beside a juicy steak or piled on a burger.
With just a few simple ingredients you’ll get big, savory flavor. The combination of browned mushrooms, caramelized onions, garlic and thyme creates rich umami notes that elevate many dishes.
Why You’ll Love This Recipe
- Learn to sauté mushrooms and onions without ending up with a mushy result.
- A quick, versatile side that pairs with practically anything.
- The best technique for mushrooms and onions for steaks and burgers.
- Simple, naturally gluten-free and easy to make.
Ingredients You Need
This recipe uses fresh mushrooms and onions plus a few pantry staples for big flavor.
- Extra virgin olive oil – Adds flavor and tolerates high heat; avocado oil works too.
- Unsalted butter – Adds richness. If you use salted butter, reduce added salt.
- Mushrooms – Brown (cremini) or white button mushrooms are ideal; you can use portobello, shiitake or a mix.
- Onion – Sweet or yellow onion works best for caramelization.
- Garlic – Fresh garlic for deeper flavor.
- Thyme – Fresh or dried thyme adds brightness; substitutes include oregano, basil or Italian seasoning.
Optional: Add sliced bell peppers with the onions and sauté until soft and fragrant.
How to Make Sautéed Mushrooms and Onions
Follow these four simple steps to create crisp, caramelized mushrooms and onions.
- Prepare the pan: Heat 2 tablespoons extra virgin olive oil and 2 tablespoons unsalted butter in a large cast-iron or stainless-steel skillet over medium-high heat until hot but not smoking.
- Sauté the mushrooms: Add 1 pound sliced mushrooms, stir to coat, then let them cook undisturbed for 4–5 minutes so they brown instead of steam.
- Add onions and aromatics: Reduce heat to medium and add 1 large sliced sweet yellow onion, 2 cloves minced garlic and 1/2 teaspoon thyme. Cook 6–7 more minutes until the mushrooms and onions are tender and nicely browned with caramelized edges.
- Season and serve: Taste and adjust with kosher salt and freshly ground black pepper. Serve alongside steaks, burgers, chicken, pasta or rice.
Expert Tips
- Dry mushrooms thoroughly: Wipe with a damp towel to remove dirt, then blot completely dry. Excess water causes steaming and rubbery texture.
- Use a hot pan: Medium-high heat helps moisture evaporate quickly so mushrooms brown instead of becoming soggy.
- Deglaze if desired: A splash of Worcestershire sauce, soy sauce or white wine lifts browned bits and intensifies flavor.
- Bright finish: Finish with a squeeze of lemon and chopped fresh parsley or chives for brightness.
FAQs
Start with the mushrooms so they can brown. Add the onions once the mushrooms have developed color and begin to caramelize.
Salt can draw out moisture, so salt toward the end of cooking to avoid soggy mushrooms.
Rubbery mushrooms often come from cooking damp mushrooms or using too-low heat. Dry the mushrooms well and cook over medium-high heat to evaporate moisture quickly.
Serving Suggestions
Sautéed mushrooms and onions are a simple way to enhance many meals. They go particularly well with:
- Pan-seared ribeye or other steaks
- Flank steak or grilled beef
- Burgers, including bunless versions
- Grilled chicken
- Quesadillas or tacos
- Roasted or braised whole chicken
- Pork chops
They also pair nicely with a side of pasta, rice or your favorite grain. Try the recipe and leave a rating or review if you like it.
Sautéed Mushrooms and Onions
Ingredients
- 2 tablespoons extra virgin olive oil
- 2 tablespoons unsalted butter
- 1 pound brown or white mushrooms, sliced
- 1 large sweet yellow onion, sliced
- 2 cloves garlic, minced
- 1/2 teaspoon kosher salt (adjust to taste)
- 1/2 teaspoon freshly ground black pepper (adjust to taste)
- 1/2 teaspoon dried thyme
Instructions
- Add the olive oil and butter to a large skillet set over medium-high heat.
- Add the mushrooms, stir to coat, and sauté undisturbed for 4–5 minutes to allow browning.
- Reduce heat to medium. Add the sliced onion, minced garlic, salt, pepper and thyme. Cook 6–7 minutes until the mushrooms and onions are soft and nicely browned.
- Adjust seasoning to taste and serve warm with your preferred main dish.
Notes
Substitutions: Swap dried thyme for Italian seasoning, basil or herbes de Provence. Add bell peppers with the onions if desired.
Storing: Refrigerate leftovers in a shallow airtight container for 3–5 days.
Freezing: Cool, pack in a freezer bag with air removed and freeze up to 3 months. Reheat from frozen in a skillet over medium-high heat.
Nutrition
Calories: 167 kcal, Carbohydrates: 11 g, Protein: 4 g, Fat: 13 g, Saturated Fat: 5 g, Sodium: 304 mg, Fiber: 2 g. (Approximate)
Nutrition information is an approximation.
Additional Info
Course: Side Dish
Cuisine: American