Savory Fillet Steak with Smashed Potatoes Recipe You’ll Love

Last Updated on March 13, 2026 by Sophie

When the weekend rolls around, there s nothing quite like the anticipation of a special meal that turns your kitchen into a cozy haven. That s how I felt when I discovered the perfect fillet steak with smashed potatoes recipe. The mere thought of juicy, dry-aged fillet steaks sizzling in the pan is enough to make my mouth water. The deep, rich aroma of garlic and herb butter melting over perfectly cooked meat is a memory I cherish during those busy weeknights.

Picture this: after a long week of fast food and takeout, I decided it was time to elevate my cooking game. I found a few staple ingredients in my kitchen, including M&S Collection dry-aged fillet steaks and ready-made smashed potatoes, and I knew I was onto something wonderful. This recipe isn t just about taste; it s about bringing a touch of restaurant-quality elegance to your dining table with minimal fuss.

Join me as we transform simple ingredients into a delightful meal that ll impress anyone sitting around your table whether it s a romantic dinner for two or a gathering with friends. Your taste buds will thank you!

Why is this fillet steak with smashed potatoes recipe a must-try?

Unforgettable Flavor: The dry-aging process creates an incredibly rich and tender steak that melts in your mouth.
Simple Preparation: With just a few steps, you ll have a gourmet meal ready in under an hour.
Crowd-Pleaser: Perfect for impressing guests or enjoying a cozy dinner at home.
Versatile Side: The smashed potatoes provide an irresistible comfort food element, pairing beautifully with the steak.
Healthy Greens: Adding Tenderstem broccoli not only elevates the dish but also offers a nutritious crunch.

This recipe is your ticket to a delightful culinary experience that turns every dinner into a special occasion!

Fillet Steak with Smashed Potatoes Ingredients

For the Steaks
2 M&S Collection British salt dry-aged fillet steaks select high-quality steaks for maximum flavor and tenderness.
1 tsp M&S steakhouse seasoning enhances the natural richness of the fillet with a perfectly balanced blend.
1 knob M&S Collection garlic and herb butter adds a luscious, aromatic finishing touch to your cooked steaks.

For the Smashed Potatoes
1 pack (425 g) M&S smashed potatoes these ready-made potatoes save time while providing comforting flavor and texture.

For the Vegetables
120 g Tenderstem broccoli offers a delightful crunch and bright green color that beautifully complements the dish.

To Serve
2 knobs M&S Collection garlic and herb butter melt over the finished steaks for an extra layer of savory goodness.

This fillet steak with smashed potatoes recipe is all about simplicity and amazing flavor, making it the ideal choice for your next home-cooked dinner!

How to Make Fillet Steak with Smashed Potatoes

1. Preheat the oven: Start by setting your oven to 220 °C/fan 200 °C/Gas mark 7. This ensures your smashed potatoes will cook perfectly crisp and golden brown.

2. Cook the smashed potatoes: Place the pack of smashed potatoes in the oven and let them bake for about 40 minutes according to the packaging instructions. They re the perfect accompaniment to your steak!

3. Prepare the steaks: After the potatoes have been cooking for 10 minutes, take the fillet steaks out of the fridge and allow them to reach room temperature for another 10 minutes for even cooking.

4. Season and sear: Generously season the steaks with salt and pepper, then coat them with the steakhouse seasoning. In a frying pan, heat 1 tablespoon of oil over high heat. Once hot, add the steaks and cook for 3-6 minutes for rare or 5-8 minutes for medium.

5. Boil the broccoli: While the steaks are cooking, bring a saucepan of water to a boil. Add the Tenderstem broccoli and cook for 4-6 minutes until vibrant green and tender, then drain and set aside.

6. Baste the steaks: Flip the steaks over in the pan and add 1 knob of garlic and herb butter. Baste the steaks with the melted butter to enhance their flavor.

7. Rest the steaks: Once cooked to your liking, transfer the steaks to a plate and let them rest for a few minutes to allow the juices to redistribute.

8. Finish the potatoes: Remove the smashed potatoes from the oven when they re ready and fluffy.

9. Plate your meal: Serve the steaks alongside the smashed potatoes and broccoli. Top each steak with 2 knobs of garlic and herb butter, and enjoy with the accompanying salsa verde dip included with the potatoes.

Optional: Garnish with chopped fresh herbs for an extra pop of flavor.

Exact quantities are listed in the recipe card below.

How to Store and Freeze Fillet Steak with Smashed Potatoes

Room Temperature: It s best to avoid leaving cooked fillet steak at room temperature for more than 2 hours to prevent spoilage.

Fridge: For optimal freshness, store leftovers in an airtight container in the fridge. They will be good for up to 3 days.

Freezer: If you want to preserve the leftovers longer, you can freeze the cooked fillet steak. Wrap it tightly in foil or place it in a freezer-safe bag for up to 3 months.

Reheating: When ready to enjoy, thaw the frozen steak overnight in the fridge. Reheat in a skillet over low heat or in the oven to maintain tenderness, and enjoy your fillet steak with smashed potatoes again!

Expert Tips for Fillet Steak with Smashed Potatoes

Resting Time: Letting the steaks rest for a few minutes after cooking helps retain their juiciness, enhancing the flavor of your fillet steak with smashed potatoes recipe.

Even Cooking: Always bring the steaks to room temperature before cooking. This ensures they cook evenly and achieve the perfect doneness throughout.

Butter Baste: Don t skip basting! Adding garlic and herb butter during cooking infuses rich flavor into the meat and elevates the overall dish.

Perfect Potatoes: For crispy smashed potatoes, ensure they re spread out on the baking sheet without crowding, allowing them to get golden brown on all sides.

Season Generously: Don t be shy with the seasoning, especially with high-quality fillet steaks. A good amount of salt and the steakhouse seasoning enhances the natural flavors beautifully.

Fillet Steak with Smashed Potatoes Variations

Feel free to play with this recipe and make it your own; your taste buds will appreciate the creative touch!

• Dairy-Free: Substitute the garlic and herb butter with vegan butter to keep it delicious and dairy-free.
  Enhancing flavors with plant-based options makes this dish accessible for everyone at your table.

• Herb-Infused: Add fresh herbs like rosemary or thyme to the garlic butter before melting it to amplify the aroma and taste.
  A touch of garden-fresh herbs brings an extra layer of sophistication to your delightful dish.

• Spicy Kick: Sprinkle a pinch of cayenne or smoked paprika on your steaks before searing for a flavorful twist.
  If you crave heat, this subtle addition will elevate your steaks to a whole new level.

• Sweet Potatoes: Swap the smashed potatoes for sweet potatoes, adding a hint of sweetness and gorgeous color.
  This twist introduces a lovely sweetness that balances perfectly with the savory fillet.

• Mushroom Medley: Roasting a mix of mushrooms alongside the broccoli will bring an earthy depth to the plate.
  This twist not only adds flavor but creates a visually stunning dish that s sure to impress.

• Balsamic Drizzle: Finish the plated dish with a drizzle of balsamic reduction for a sweet and tangy contrast.
  Adding this touch can redefine your meal, bringing balance and brightness to each bite.

• Stuffed Potatoes: Instead of smashed, try fully baking small potatoes, then stuffing them with garlic, herbs, and cheese.
  This method adds extra texture and flavor, turning simplicity into a more sophisticated creation.

• Crispy Brussels Sprouts: Swap out the broccoli for roasted Brussels sprouts for a delightful crunch and nutty flavor.
  This alternative adds a new dimension to your meal with a crispy bite that will leave you wanting more.

What to Serve with Fillet Steak with Smashed Potatoes?

Building a satisfying meal around this tender, flavorful steak will elevate your dining experience to new heights.

• Garlicky Green Beans: The crispness of green beans saut ed in garlic pairs wonderfully with the richness of the steak, adding a fresh burst of flavor.

• Creamy Mushroom Risotto: This luscious risotto brings earthy notes that harmonize beautifully with the savory notes of the steak, creating a comforting contrast.

• Roasted Carrots: Sweet, caramelized roasted carrots add a lovely color and slight crunch, balancing the richness of the steak and potatoes.

• Herbed Quinoa Salad: Light and refreshing, this salad infused with fresh herbs and lemon adds a punch of brightness that perfectly complements the main dish.

• Red Wine: A robust red wine like Cabernet Sauvignon works wonders, amplifying the flavors of the fillet and enhancing the overall dining experience.

• Chocolate Fondue: End the meal with a touch of indulgence! Pair your steak with a rich chocolate fondue served with strawberries and marshmallows for a sweet finale.

• Sparkling Water with Lime: Refreshing and light, sparkling water with a hint of lime cleanses the palate, ensuring every bite of your fillet steak with smashed potatoes shines.

Make Ahead Options

These fillet steak with smashed potatoes recipe components are perfect for meal prep and can save you precious time during busy weeknights! You can season the fillet steaks (2) up to 24 hours in advance; just wrap them tightly in plastic wrap and refrigerate to maintain their juiciness. The smashed potatoes (1 pack) can be cooked ahead and stored in the fridge for up to 3 days simply reheat them in the oven for a crispy finish before serving. When you re ready to enjoy your meal, just take the steaks out to reach room temperature, sear them, and cook the broccoli last for perfectly fresh greens. You ll have a delicious dinner ready with minimal effort!

Fillet Steak with Smashed Potatoes Recipe FAQs

How do I choose the best dry-aged fillet steaks?
Absolutely! Look for steaks that have a rich, dark color and a slight firmness to the touch. Fresh steaks should have marbling (the fat within the meat) for juiciness. If you see any dark spots or discoloration, it s best to avoid them. Fresh, high-quality steaks will always give you the best results in your fillet steak with smashed potatoes recipe.

What s the best way to store leftover fillet steak and smashed potatoes?
Very important! Store any leftover fillet steak in an airtight container and refrigerate it within 2 hours of cooking. It can last for up to 3 days. For the smashed potatoes, you can keep them in the same container. If you want to keep the steak longer, consider wrapping it tightly in foil or placing it in a freezer-safe bag. It can go in the freezer for up to 3 months.

Can I freeze the cooked fillet steak?
Absolutely! To freeze your cooked fillet steak, ensure it has cooled completely. Wrap it tightly in foil or place it in a freezer-safe zip-lock bag, squeezing out the air for an airtight seal. This way, it will retain its flavor and texture. When you re ready to enjoy it again, thaw it in the fridge overnight and reheat in a skillet on low heat or in the oven to prevent drying out.

What if my fillet steak is overcooked?
Don t worry! If you find that your steak became overcooked, slicing it thinly can help it feel more tender. You might also serve it with a sauce or gravy to add moisture. If you love steak, having a meat thermometer can be a game-changer. Aim for around 52 °C (125 °F) for rare or 60 °C (140 °F) for medium.

Is this recipe suitable for gluten-free diets?
Yes, indeed! Just ensure your steakhouse seasoning doesn t contain gluten and that the smashed potatoes are certified gluten-free. Many brands offer gluten-free options now, so always check the label if you re cooking for someone with allergies. Also, using fresh veggies and butter, like in this fillet steak with smashed potatoes recipe, keeps it safe and delicious.

Can I use a different vegetable instead of broccoli?
Very much so! Feel free to substitute the Tenderstem broccoli with asparagus, green beans, or even a side salad. The key is to maintain that vibrant color and crunch to balance the richness of the steaks and potatoes. Enjoy experimenting!