Name: Steak with Mushroom Gravy and Creamy Mashed Potatoes
Prep time: 30 min
Cook time: 30 min
Total time: 60 min
Ingredients: 4 pieces steaks (ribeye, sirloin, or your preferred cut); 2 tablespoons olive oil or butter (For searing.); Salt and pepper to taste (Simple seasoning highlights the beef.); 2 cups mushrooms, sliced (cremini or button) (Use portobello for a meatier feel.); 2 tablespoons butter (For sautéing mushrooms.); 2 cloves garlic, minced; 1 cup beef broth (Low-sodium if you’re watching salt.); 1/2 cup heavy cream (For a luxurious finish.); 1 tablespoon cornstarch mixed with 2 tablespoons water (For thickening the gravy.); 2 lbs potatoes, peeled and cubed (Yukon Gold or Russet) (Both mash well.); 4 tablespoons unsalted butter (For extra creaminess in the mash.); 1/2 cup milk; 1/4 cup heavy cream (For the mash.); Salt and pepper to taste

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I’ve been making steak with mushroom gravy and creamy mashed potatoes for family dinners for years — it’s the kind of comfort food that feels special without demanding a restaurant skill set. Seared steaks, an earthy mushroom gravy, and pillowy mashed potatoes come together in under an hour for a reliably impressive meal. If you want a slightly different take or extra photos to follow along, try this alternate version: Steak with mushroom sauce and creamy mashed potatoes.

Why you’ll love this dish

This meal balances rich, savory flavors with simple technique. You get:

A caramelized, crusty steak with juicy interior.
Mushrooms and pan juices turned into a silky gravy.
Mashed potatoes that are creamy, comforting, and perfect for soaking up the sauce.

"This was the coziest dinner — steaks with a glossy mushroom gravy and the best mashed potatoes I’ve made at home." — a regular at my Sunday suppers

It’s ideal for weeknight dinners when you want something slightly elevated, date nights, or small gatherings. The recipe scales well and can be prepped in stages.

How this recipe comes together

Step-by-step overview to set expectations:

Peel and boil potatoes until fork-tender; drain and mash with butter, milk, and cream for smooth, rich mashed potatoes.
Season and sear steaks in a hot skillet until well-browned; rest to keep juices locked in.
Use the same pan: sauté mushrooms, add garlic, deglaze with beef broth, stir in cream, and thicken with a cornstarch slurry to make the gravy.
Slice steaks and serve over mashed potatoes, spooning mushroom gravy over the top.

This order keeps the pans and flavors concentrated and ensures hot steaks and warm gravy when plating.

Gather these items

What you’ll need:

4 steaks (ribeye, sirloin, or your preferred cut) — choose cuts you love; ribeye gives more fat and flavor, sirloin is leaner and budget-friendly.
Salt and pepper to taste — simple seasoning highlights the beef.
2 tbsp olive oil or butter for searing.
2 cups mushrooms, sliced — cremini or button work well; use portobello for a meatier feel.
2 tbsp butter for the mushrooms.
2 cloves garlic, minced.
1 cup beef broth — low-sodium if you’re watching salt.
1/2 cup heavy cream — for a luxurious finish.
1 tbsp cornstarch mixed with 2 tbsp water for a slurry — thickens the gravy without graininess.
2 lbs potatoes, peeled and cubed — Yukon Gold or Russet both mash well.
1/2 cup milk.
1/4 cup heavy cream (for the mash).
4 tbsp unsalted butter (for extra creaminess in the mash).

Substitutions/notes inline: swap half-and-half for heavy cream in the mash to lighten it; use vegetable broth for a milder gravy if preferred. For a faster weeknight version, cut potatoes smaller to reduce boil time. For a lower-dairy option, use olive oil and unsweetened almond milk in the mash.

Also see this related method for a different steak-and-mushroom approach: hamburger steaks with onion and mushroom gravy.

Step-by-step instructions

Delicious steak with mushroom gravy and creamy mashed potatoes on a plate.

Preparation of Mashed Potatoes

Place peeled, cubed potatoes in a large pot and cover with cold water. Add a pinch of salt.
Bring to a boil, then simmer 15–20 minutes until fork-tender.
Drain well and return to the pot over low heat 30 seconds to evaporate excess moisture.
Mash with 4 tbsp unsalted butter, 1/2 cup milk, and 1/4 cup heavy cream. Season with salt and pepper. Keep warm.

Cooking the Steaks

Pat steaks dry and season both sides with salt and pepper. Let rest at room temperature 20–30 minutes if you have time.
Heat a heavy skillet (preferably cast iron) over medium-high heat. Add 2 tbsp olive oil or butter until shimmering.
For 1-inch steaks: sear 3–4 minutes per side for medium-rare. Adjust time for thickness. Use an instant-read thermometer: remove steaks at about 125–130°F for medium-rare (carryover will raise temp), 135°F for medium.
Transfer steaks to a plate and tent loosely with foil; rest 5–10 minutes.

Making the Mushroom Gravy

In the same skillet with steak drippings, reduce heat to medium and add 2 tbsp butter.
Add sliced mushrooms and sauté until golden, about 5–7 minutes. Season lightly.
Stir in minced garlic for 30 seconds until fragrant.
Pour in 1 cup beef broth, scraping browned bits from the pan (deglazing — this is flavor).
Stir in 1/2 cup heavy cream and simmer 2–3 minutes.
Whisk in the cornstarch slurry gradually until the gravy reaches your desired thickness. Taste and adjust seasoning.

Assembling and Serving

Spoon mashed potatoes onto plates or a family platter.
Slice steaks against the grain if using sirloin. Place steaks on or beside the mash.
Spoon mushroom gravy generously over the steak and potatoes. Garnish with chopped parsley if you like.

Serving suggestions

Best ways to enjoy it:

Plate with a simple green vegetable: steamed broccoli, sautéed green beans, or roasted Brussels sprouts cut the richness and add color.
For wine: a medium-bodied red like Cabernet Sauvignon or Merlot pairs nicely.
Family-style: serve on a large platter so guests can help themselves and the potatoes soak up extra gravy.
For presentation: make a shallow well in the mash to hold the gravy and sprinkle fresh thyme or parsley for contrast.

How to store & freeze

Keeping leftovers fresh:

Refrigerate: Store steaks with gravy separately from mashed potatoes in airtight containers. Consume within 3–4 days.
Freeze: Gravy freezes well for 2–3 months. Mashed potatoes can be frozen, but texture may change slightly; for best results, freeze before adding all the dairy and add cream/butter when reheating.
Safe handling: cool leftovers to room temperature no longer than 2 hours before refrigerating, and reheat to 165°F before serving.

Reheating tips

Mashed potatoes: reheat on the stovetop over low heat with a splash of milk or cream, stirring until smooth; or microwave in short bursts, stirring between.
Steak: reheat gently in a 275°F oven until warmed through (about 10–15 minutes depending on thickness), or slice and warm in a skillet with a splash of broth or butter to prevent drying.
Gravy: reheat on the stovetop over low heat, whisking to remove any separation; add a spoonful of cream if it looks grainy.

Pro chef tips

Helpful cooking tips for a better result:

Dry the steaks thoroughly before seasoning. Moisture = less effective sear.
Don’t crowd the pan when searing steaks; work in batches so each steak gets an even crust.
Use the pan juices for gravy — that fond is flavor gold. Deglaze with beef broth to lift those browned bits.
Make the cornstarch slurry in a small cup and whisk it in slowly. Add too much at once and the gravy can thicken unevenly.
Resting is essential: cutting too early loses juices.
For ultra-smooth mash, use a ricer or food mill; for rustic texture, use a hand masher.
If you want to prep ahead: make the gravy and mashed potatoes earlier in the day and reheat gently, then sear steaks last to serve immediately.

For another quick alternative method to the steak and mushroom pairing, try this version with slightly different steps: alternate method for steak and mushroom sauce.

Flavor swaps

Creative twists:

Lighter sauce: replace some cream with extra beef broth and finish with a pat of butter for gloss instead of full cream.
Bolder flavor: add 1 tsp Dijon mustard or a splash of Worcestershire sauce to the gravy.
Herb-forward: stir in chopped thyme or rosemary when sautéing mushrooms.
Vegetarian: swap steaks for thick portobello caps or seared cauliflower steaks and use vegetable broth.
Dairy-free: use olive oil and a plant-based cream in the gravy, and dairy-free butter with oat or almond milk in the mash.

Your questions answered

Q: How long will this take from start to finish?
A: Plan on 45–60 minutes total. Much depends on steak thickness and whether you prep ingredients in advance.

Q: Can I make the gravy ahead of time?
A: Yes — make the gravy up to two days ahead and refrigerate. Reheat gently on the stove. If it becomes too thick, thin with a splash of broth.

Q: My gravy is lumpy after adding cornstarch. What went wrong?
A: Lumps happen when cornstarch is added dry or added at too high a temperature. Always mix cornstarch with cold water first and whisk it in slowly while simmering. If lumps form, strain the gravy or whisk vigorously over low heat.

Q: What internal temperature should I aim for with the steak?
A: For medium-rare, remove around 125–130°F and rest to reach ~130–135°F. For medium, remove at 135°F. Use an instant-read thermometer for accuracy.

Q: Can I use frozen mashed potatoes?
A: Yes, but texture can change. Reheat gently and add a splash of milk/cream to refresh creaminess.

Conclusion

This steak with mushroom gravy and creamy mashed potatoes is a reliable, comforting meal that rewards a few simple techniques: a good sear, careful resting, and using pan juices for a deep-flavored gravy. If you want another mushroom-focused sauce idea, check out Skillet Steak Bites in Mushroom Gravy – The Whole Cook for inspiration. For a slightly different Salisbury-style approach to mushroom gravy, see this guide to Easy Salisbury Steak with Mushroom Gravy – Bowl of Delicious. And if you want a flexible mushroom sauce that works on everything from steak to pasta, this piece is excellent: A Mushroom Sauce for Everything! – RecipeTin Eats. Enjoy — and don’t skip the resting step; it’s the difference between a good steak and a great one.