Name: Garlic-Rosemary Steak with Baked Potatoes and Umami Butter Recipe
Prep time: 15 min
Cook time: 1 h 5 min
Total time: 1 h 20 min
Cuisine: American
Ingredients: 2 large steaks (such as rump or sirloin, about 8 oz / 250 grams each); 1 teaspoon salt; 1 tablespoon olive oil; 1 tablespoon butter; 2 sprigs rosemary; 2 cloves garlic; ½ teaspoon pepper; 4 large Sebago potatoes (about 220-250 grams / 7-8 oz each, brushed clean and dried); A few pinches of salt (optional); 3.5 oz butter (cubed, softened to room temperature, 100 grams); 2 cloves garlic (large cloves or use 4 medium cloves, roasted); 2 teaspoons fish sauce; 1 tablespoon soy sauce (or Tamari for gluten-free); 1 tablespoon Worcestershire sauce; ½ cup grated Parmesan cheese

Print Recipe· 3.9 from 15 reviews

If you are craving a meal that combines rich, savory flavors with comforting textures, the Garlic-Rosemary Steak with Baked Potatoes and Umami Butter Recipe is exactly what you need. This delightful dish brings together perfectly seared steaks infused with aromatic garlic and rosemary, paired with tender baked potatoes topped with a sensational umami butter that elevates every bite. It’s a dish that feels both luxurious and approachable, ideal for impressing friends or simply indulging yourself on any night of the week.

Ingredients You’ll Need

The image shows a small white bowl filled with a creamy, light yellow spread with a smooth and slightly fluffy texture. A silver spoon with decorative swirls on the handle rests inside the bowl, partially covered in the spread. In the background, there is a black pan containing baked potatoes with golden brown, slightly wrinkled skin, split open to reveal soft, pale yellow insides with bits of melted butter and small green herbs on top. The whole setup is placed on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

The magic of this recipe lies in its simplicity. Each ingredient is carefully chosen to build deep layers of flavor while keeping the method straightforward and accessible. From the fragrant sprigs of rosemary to the buttery richness of the umami butter, every element works beautifully to create a dish that’s bursting with aroma and taste.

2 large steaks (rump or sirloin): Choose cuts about 8 oz each for perfect balance between tenderness and flavor.
1 teaspoon salt: Enhances the natural taste of the steak and the potatoes.
1 tablespoon olive oil: Provides a healthy fat for searing and adds a subtle fruity note.
1 tablespoon butter: Adds richness and helps develop the crust on the steak during cooking.
2 sprigs rosemary: Infuse steaks with fragrant, earthy aromatics during cooking.
2 cloves garlic: Adds a mellow sweetness when roasted and a punch of flavor when cooked with steak.
½ teaspoon pepper: For a mild, warm heat that complements the steak’s savoriness.
4 large Sebago potatoes: Ideal for baking to fluffy perfection inside with a crispy skin outside.
A few pinches of salt (optional): To sprinkle on potatoes for added seasoning.
3.5 oz (100 grams) softened butter: The base of the umami butter, essential for creamy richness.
2 cloves garlic (large or 4 medium): Roasted to a soft sweetness, forming the heart of the umami butter.
2 teaspoons fish sauce: Brings salty, savory depth to the butter. A little goes a long way!
1 tablespoon soy sauce: Adds mild saltiness and umami vibrancy. Tamari can be used for gluten-free option.
1 tablespoon Worcestershire sauce: Adds complexity with tang and spice.
½ cup grated Parmesan cheese: For an earthy, nutty finish in the umami butter.

How to Make Garlic-Rosemary Steak with Baked Potatoes and Umami Butter Recipe

Step 1: Bake the Potatoes

Start by preheating your oven to 200°C (400°F). Take your scrubbed and dried Sebago potatoes and pierce them about 6 times with a fork to help steam escape during baking. Pop these directly on the oven rack to ensure even cooking and crisp skins. Bake for 50 to 60 minutes until tender all the way through. For an extra savory touch, sprinkle a few pinches of salt on the potatoes before baking if you like.

Step 2: Roast Garlic for the Umami Butter

While the potatoes are baking, roast the garlic that will make the umami butter truly irresistible. Place 2 to 4 cloves of garlic (still in their skins) on a small tray or parchment paper in the oven. After about 15 minutes, they’ll be soft and fragrant, ready to add mellow depth to your butter.

Step 3: Prepare the Umami Butter

Squeeze the roasted garlic out of their skins and blend them in a food processor with the softened butter, fish sauce, soy sauce, Worcestershire sauce, and the Parmesan cheese. Blend until everything is smooth and creamy. This umami butter will be your secret weapon, bringing a rich, savory twist to both the potatoes and steak.

Step 4: Cook the Steaks

Allow your steaks to sit out at room temperature for 10 to 15 minutes before cooking to ensure even cooking. Season both sides with salt. Heat a skillet on medium-high and add olive oil and butter. Once hot, add steaks and cook for approximately 3.5 to 4 minutes per side for a perfect medium doneness. During cooking, toss in the garlic cloves and rosemary sprigs, basting the steaks continuously with the infused butter to lock in those gorgeous flavors. After cooking, transfer the steaks to a cutting board and let them rest for a minute to keep the juices locked in.

Step 5: Assemble and Serve

Slice the rested steaks and return them to the skillet, adding any juices from the cutting board back into the pan – the flavor boost is worth it! Pull your baked potatoes from the oven and cut a deep cross on top; gently squeeze to open the fluffy interior. Add a generous dollop of your homemade umami butter to each potato and on top of those tender steak slices for that final luscious touch. Serve the remainder of the umami butter on the side so everyone can add more as they please.

How to Serve Garlic-Rosemary Steak with Baked Potatoes and Umami Butter Recipe

The image shows a close-up of a black pan filled with food placed on a white marbled surface. Inside the pan, there are four baked potatoes with golden brown skin, each split open to reveal a fluffy, light yellow inside mixed with white and small green herb pieces on top. Next to the potatoes, there are several slices of cooked steak, showing a browned outside with a pink center, garnished with green herbs and small pieces of roasted garlic. Some sprigs of fresh rosemary are also placed in the pan, adding a green and woody texture near the steak. photo taken with an iphone --ar 4:5 --v 7

Garnishes

Fresh herbs like finely chopped parsley or chives bring a bright contrast to the rich steak and potatoes, plus a sprinkle of flaky sea salt over the steak can add a delightful crunch and amplify flavor. Don’t forget a wedge of lemon on the side; a gentle squeeze brightens every bite without overpowering the dish.

Side Dishes

This dish is wonderfully satisfying on its own, but if you want to add some greenery, consider a simple arugula salad tossed lightly with lemon and olive oil or steamed asparagus with a sprinkle of toasted almonds. The freshness and texture contrast make the entire meal feel balanced and fresh.

Creative Ways to Present

Serve the steak slices atop the open baked potatoes for a rustic yet elegant look. For a bit of drama, plate the steak slices fanned out with a dollop of umami butter melting down the sides. Using cast iron skillets or wooden boards for serving adds warmth to your presentation that matches the heartiness of the meal perfectly.

Make Ahead and Storage

Storing Leftovers

If you’re lucky enough to have leftovers, store the steak, potatoes, and umami butter separately in airtight containers. This prevents the potatoes from becoming soggy and keeps the flavors fresh. Steak will maintain its juiciness better when sliced just before reheating.

Freezing

While steak is best enjoyed fresh, you can freeze the baked potatoes and umami butter separately. Keep the butter well-wrapped to avoid picking up other odors, and thaw slowly in the refrigerator before reheating or using.

Reheating

Reheat the potatoes in the oven to maintain that crispy skin, and warm the steak gently in a skillet over medium-low heat or covered in the microwave for short intervals to avoid overcooking. Warm the umami butter to soften just before spreading for that melt-in-your-mouth effect.

FAQs

Can I use other cuts of steak for this recipe?

Absolutely! While rump or sirloin are recommended for their balance of flavor and tenderness, ribeye or strip steaks also work beautifully. Just adjust cooking times as needed based on thickness.

What if I don’t have fish sauce for the umami butter?

You can substitute with a splash of extra soy sauce or miso paste for a similar depth of umami, though fish sauce gives the butter its unique savoriness.

Can this recipe be made gluten-free?

Yes! Just swap regular soy sauce for tamari or another gluten-free soy sauce alternative, and double-check Worcestershire sauce ingredients or use a gluten-free version.

How do I know when the potatoes are fully baked?

When pierced with a fork or skewer, the potato should feel soft inside without resistance. The skin should also be crispy and well-roasted.

Is the umami butter suitable to prepare in advance?

Definitely! The umami butter can be made several hours or even a day ahead and stored in the refrigerator. Just bring it back to room temperature before serving for easy spreading and melting.

Final Thoughts

This Garlic-Rosemary Steak with Baked Potatoes and Umami Butter Recipe is a true crowd-pleaser that brings together simple ingredients in an unforgettable way. It’s perfect for cozy dinners, special occasions, or whenever you want to treat yourself to something extraordinary yet effortless. Give it a try and watch how quickly it becomes a favorite in your kitchen, guaranteed to bring warmth and smiles to everyone around your table.