If there is one meal that perfectly captures the essence of keto eating—rich, satisfying, high in protein, and full of bold flavor—it’s Keto Garlic Butter Mushrooms with Steak. This dish combines juicy, pan-seared steak with deeply savory mushrooms coated in fragrant garlic butter, creating a restaurant-quality meal that’s surprisingly easy to make at home. It’s indulgent without being heavy, simple yet luxurious, and ideal for anyone following a ketogenic or low-carb lifestyle.
What makes this recipe especially appealing is its balance. Steak provides high-quality protein and essential fats, while mushrooms bring earthiness, texture, and umami without adding carbs. Garlic butter ties everything together, infusing the entire dish with richness and aroma. Whether you’re preparing a quick weeknight dinner, a romantic at-home date night meal, or a hearty lunch that keeps you full for hours, this keto-friendly recipe delivers flavor, nutrition, and satisfaction in every bite.
Ingredients
Equipment
Method
- Pat the steak dry with paper towels. Season generously on both sides with salt, black pepper, and paprika if using. Let it rest at room temperature for 20–30 minutes before cooking.
- Heat a cast iron skillet over medium-high heat. Add olive oil or avocado oil and allow it to heat until shimmering.
- Place the steak in the hot skillet. Sear for 3–5 minutes per side, depending on thickness and desired doneness. Avoid moving the steak while searing to develop a proper crust.
- Reduce heat to medium. Add butter, garlic, and herbs to the skillet. Tilt the pan slightly and spoon the melted garlic butter over the steak continuously for 1–2 minutes.
- Remove the steak from the pan and let it rest on a plate for at least 5 minutes. This allows the juices to redistribute.
- In the same skillet, add more butter if needed. Add mushrooms and cook over medium heat until they release their moisture and become golden brown, about 6–8 minutes.
- Add garlic, salt, pepper, and red pepper flakes if using. Stir well and cook for another minute until fragrant.
- Slice the rested steak and return it to the skillet with the mushrooms. Toss gently to coat everything in garlic butter. Finish with lemon juice and parsley if desired.
Notes
Nutritional Facts and Total Calories (Approximate, per serving)
- Calories: 520–580 kcal
- Protein: 38–42g
- Fat: 40–45g
- Net Carbs: 4–6g
- Fiber: 1–2g
Keto Garlic Butter Mushrooms with Steak
Ingredient Notes
Steak
Steak is the star of this recipe, and choosing the right cut makes a big difference. Ribeye is rich and marbled, making it ideal for keto due to its high fat content. Sirloin is leaner but still flavorful, while strip steak offers a balance between tenderness and richness. Filet mignon is extremely tender with a milder flavor. Choose a steak that is at least 1 inch thick for best results. Let it come to room temperature before cooking to ensure even searing.
Mushrooms
Mushrooms add incredible depth and umami while remaining low in carbohydrates. Button mushrooms are mild and affordable, cremini mushrooms offer a deeper, earthier flavor, and baby bella mushrooms bring a meatier texture. Avoid washing mushrooms under running water; instead, wipe them clean with a damp cloth to prevent sogginess.
Butter
Butter is essential for flavor and richness. Unsalted butter allows better control over seasoning. It melts into the mushrooms and steak, creating a luxurious garlic-infused sauce that coats every bite.
Olive Oil or Avocado Oil
Using a small amount of oil prevents the butter from burning during high-heat cooking. Avocado oil is ideal due to its high smoke point, but olive oil works well too.
Garlic
Fresh garlic is key to this recipe. When sautéed gently in butter, it becomes aromatic and slightly sweet. Avoid burning the garlic, as it can turn bitter.
Fresh Herbs (Optional)
Thyme and rosemary pair beautifully with steak and mushrooms. They add a subtle herbal aroma and elevate the dish without overpowering it.
Salt & Black Pepper
Proper seasoning is crucial. Use coarse salt for the steak to help create a flavorful crust. Freshly cracked black pepper adds warmth and depth.
Paprika & Red Pepper Flakes (Optional)
Paprika adds mild smokiness, while red pepper flakes provide gentle heat for those who enjoy spice.
Lemon Juice (Optional)
A small squeeze of lemon juice at the end brightens the dish and balances the richness of the butter.
Parsley (Optional Garnish)
Fresh parsley adds color, freshness, and a clean finish to the dish.
Serving Instructions
Serve Keto Garlic Butter Mushrooms with steak hot, straight from the skillet. This dish pairs beautifully with keto-friendly sides like cauliflower mash, zucchini noodles, sautéed spinach, or a crisp green salad. Spoon extra garlic butter mushrooms over the steak for maximum flavor.
Tips
- Always let steak rest before slicing
- Use a cast iron skillet for best sear
- Don’t overcrowd the pan when cooking mushrooms
- Add garlic at the end to prevent burning
- Choose thicker cuts of steak for juicier results
- Adjust butter quantity based on fat preference
Storage Information
- Refrigerator: Store leftovers in an airtight container for up to 3 days
- Freezer: Not recommended, as mushrooms lose texture
- Reheating: Reheat gently in a skillet over low heat with a little butter
FAQs
1. What’s the best steak cut for keto?
Ribeye is ideal due to its high fat content, but sirloin and strip steak also work well.
2. Can I make this dairy-free?
Yes, substitute butter with dairy-free keto-friendly alternatives, though flavor will differ.
3. Are mushrooms keto-friendly?
Yes, mushrooms are low in carbs and rich in nutrients, making them perfect for keto.
4. Can I cook this in advance?
It’s best enjoyed fresh, but leftovers can be reheated gently.
5. How do I know when steak is done?
Use a meat thermometer: 130°F for medium-rare, 140°F for medium.
6. Can I add more vegetables?
Yes, low-carb vegetables like asparagus, spinach, or zucchini pair well.
