A satisfying and hearty meal, this Ribeye Steak with Caramelized Onions and Mashed Potatoes is a perfect combination of flavors and textures. Juicy, perfectly cooked steak pairs beautifully with the sweetness of caramelized onions and the creamy richness of mashed potatoes for a restaurant-quality dish you can make at home.

Why You’ll Love This Recipe

• The ribeye steak is tender, flavorful, and juicy.
• Sweet caramelized onions add depth and balance to the savory steak.
• Creamy mashed potatoes make this a classic comfort food pairing.
• A perfect dinner for special occasions or indulgent weeknights.
• Straightforward to prepare, yet impressive enough to serve to guests.

Ingredients

(Tip: You can find the complete list of ingredients and their measurements in the recipe card below.)

For the Steak

• Ribeye steaks (10–12 oz each)
• Kosher salt
• Black pepper
• Olive oil
• Butter
• Fresh thyme
• Garlic cloves, smashed

For the Caramelized Onions

• Onions, thinly sliced
• Butter
• Olive oil
• Sugar
• Salt

For the Mashed Potatoes

• Yukon Gold potatoes, peeled and cubed
• Heavy cream (warm)
• Butter (softened)
• Salt and pepper

Directions

Prepare the Caramelized Onions

1. Heat butter and olive oil in a large skillet over medium heat.
2. Add sliced onions, sugar, and salt, stirring to coat evenly.
3. Cook slowly, stirring occasionally, for 25–30 minutes, until the onions are golden brown and caramelized. Set aside.

Cook the Steak

1. Season ribeye steaks generously with salt and pepper on both sides.
2. Heat olive oil in a cast-iron skillet over high heat until shimmering.
3. Place the steaks in the skillet and sear for 3–4 minutes on each side. Reduce the heat to medium.
4. Add butter, thyme, and smashed garlic to the skillet. Spoon the melted butter over the steaks for 2–3 minutes for added flavor.
5. Remove the steaks from the skillet and let rest for 5 minutes to allow the juices to redistribute.

Make the Mashed Potatoes

1. Boil the cubed potatoes in salted water until fork-tender, about 15–20 minutes.
2. Drain and mash the potatoes until smooth.
3. Stir in warm heavy cream, softened butter, and season with salt and pepper to taste. Adjust the consistency with additional cream if needed.

Assemble and Serve

1. Plate a generous serving of mashed potatoes on each plate.
2. Add a ribeye steak alongside the potatoes.
3. Top the steak with caramelized onions and garnish with fresh thyme if desired.

Servings and Timing

• Servings: 2
• Prep Time: 15 minutes
• Cooking Time: 40 minutes
• Total Time: 55 minutes

Variations

• Cheesy Mashed Potatoes: Mix shredded Parmesan or cheddar into the mashed potatoes for extra flavor.
• Vegetable Side: Add roasted asparagus, green beans, or a fresh salad alongside the dish.
• Herb Butter: Use a compound butter infused with garlic and herbs for basting the steaks.
• Red Wine Sauce: Replace caramelized onions with a quick red wine reduction sauce for a sophisticated twist.
• Chicken or Pork Option: Substitute ribeye with chicken breast or pork chops for a leaner alternative.

Storage/Reheating

• Storage: Store leftover steak, onions, and mashed potatoes in separate airtight containers in the refrigerator for up to 3 days.
• Reheating: Reheat steak in a skillet over low heat with a splash of broth or water to prevent it from drying out. Warm mashed potatoes and onions in the microwave or stovetop.
• Freezing: Mashed potatoes can be frozen in a freezer-safe container for up to 3 months. Defrost and reheat with additional cream to restore texture.

FAQs

1. Can I use a different cut of steak?

Yes, New York strip or filet mignon are great alternatives. Adjust the cooking time based on thickness.

2. How do I know when the steak is cooked to my liking?

Use a meat thermometer: 125°F for rare, 135°F for medium-rare, 145°F for medium, and 160°F for well-done.

3. What’s the secret to perfect caramelized onions?

Cook them low and slow, stirring occasionally to prevent burning, and be patient as they develop their deep, sweet flavor.

4. Can I prepare mashed potatoes ahead of time?

Yes, keep them warm in a slow cooker or reheat with additional cream and butter.

5. How can I make the steak more flavorful?

Marinate the steak in olive oil, garlic, and fresh herbs for 1–2 hours before cooking.

6. What’s the best skillet for cooking steak?

A cast-iron skillet retains heat well and provides a perfect sear.

7. Can I add other seasonings to the steak?

Absolutely! Garlic powder, smoked paprika, or rosemary can enhance the flavor.

8. How can I avoid overcooking the steak?

Use a meat thermometer and remove the steak from heat slightly before it reaches the desired temperature, as it will continue to cook while resting.

9. Can I use red potatoes instead of Yukon Gold?

Yes, but Yukon Gold potatoes provide a creamier texture.

10. What pairs well with this dish?

A glass of full-bodied red wine, such as Cabernet Sauvignon or Merlot, complements this hearty meal beautifully.

Conclusion

Ribeye Steak with Caramelized Onions and Mashed Potatoes is a comforting and indulgent dish that’s sure to impress. With its perfectly seared steak, sweet onions, and creamy potatoes, this recipe brings together the best flavors and textures for a satisfying meal. Try it for a date night, family dinner, or any occasion that calls for a touch of culinary excellence.

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