If you love rich, luxurious comfort food, this truffle parmesan steak and mash is the kind of dinner that makes any night feel special. It combines perfectly cooked ribeye, fluffy buttery mash and a fragrant truffle herb butter that pulls everything together. This dish is simple enough for a weeknight but impressive enough for date night or guests. I love making truffle parmesan steak and mash when I want something indulgent without a complicated ingredient list.
This dish turns simple steak and potatoes into a luxurious, restaurant-style plate with almost no effort. Tender pink steak is finished with a silky garlic-parsley truffle butter that melts into every slice, while the mash stays creamy, fluffy, and delicately perfumed with truffle. It’s indulgent without being fussy, making it perfect for date nights, dinner parties, or a weekend treat. The flavours are bold, comforting, and universally crowd-pleasing.
If you love steak recipes like this one then you should try one of my steak pasta recipes such as my garlic parmesan steak pasta or my cowboy butter steak pasta!
Ingredients
Steak ingredients
Ribeye steaks - Ribeye is my favourite cut for truffle parmesan steak and mash. It has beautiful marbling which melts during cooking and creates a naturally tender, juicy texture. The richness of ribeye pairs perfectly with earthy truffle flavours.
Olive oil - A small amount of olive oil helps the seasoning cling to the steak and promotes a golden crust in the pan. I like using olive oil because it adds subtle flavour without overpowering the truffle.
Butter - Butter is essential for basting. It creates a nutty, glossy finish on the steak and carries the garlic and herbs beautifully. I love using butter in truffle parmesan steak and mash because it enhances the luxurious feel of the dish.
Sea salt and black pepper - Sea salt draws moisture to the surface early, which helps create a deep crust. Black pepper adds warmth and aroma that complements the steak and the truffle.
Fresh thyme - Thyme infuses the butter while basting. It gives the steak a gentle savoury aroma that works especially well in truffle parmesan steak and mash.
Fresh flat leaf parsley and chives - Parsley brings freshness which brightens the richness. Chives add a mild onion flavour that cuts through the creamy mash. I love using chives because they give such a clean, sharp finish.
Garlic - Garlic is a must for building flavour in the herb butter and during basting. It adds an aromatic foundation that ties the steak and mash together.
Truffle oil - Truffle oil is what gives this truffle parmesan steak and mash recipe its signature flavour. I use it sparingly since a little goes a long way. It brings earthy depth and luxury to every bite.
For the potatoes
Potatoes - A fluffy potato provides the perfect base for truffle parmesan steak and mash. Whether you peel and boil your own or use shop bought mash, the goal is smooth, creamy comfort.
Butter - Butter enriches the potatoes and makes them silky. It helps them hold the steak cubes well and complements the truffle flavours.
Milk - Milk loosens the mash until it becomes cloud soft and spreadable. It gives the potatoes the perfect texture for truffle parmesan steak and mash.
See recipe card for quantities.
Instructions
- Step 1: Remove the ribeye from the fridge and season generously with sea salt. Let the steaks sit so the salt can penetrate the meat. This gives a deeper flavour and a better crust later. Melt 1 tablespoon of the butter then stir in 1 clove of minced garlic the chopped parsley and a little truffle oil. This mixture becomes the finishing drizzle that defines the flavour of truffle parmesan steak and mash.
- Step 2: If making mash from scratch, peel and quarter the potatoes and place them into salted water. Bring the pot to a boil and cook until tender. While they boil, rub the salted steaks with black pepper and a touch of olive oil. Heat a large pan until very hot. Add the steaks and sear for a few minutes on each side. Add butter, a smashed garlic clove and the thyme. Baste the steaks repeatedly to coat them in aromatic butter. Rest the steaks once cooked to keep them juicy.
- Step 3: Drain the potatoes and mash them with butter and milk until smooth and creamy. The mash is the foundation of your truffle parmesan steak and mash so make it as soft and velvety as possible. Cube the rested steak for topping the mash with.
- Step 4: Spread the mash onto plates and add the steak on top. Spoon over the warm truffle herb butter and finish with chopped chives. This final drizzle brings the whole truffle parmesan steak and mash together with maximum flavour.
Hint: Salt the steak 30–60 minutes before cooking. This dry brine improves browning, seasoning, and tenderness. Pat it dry before searing for that deep crust that contrasts beautifully with the buttery mash. It’s a small step that makes a huge difference.
Substitutions
Steak – Swap with sirloin tips, ribeye, or bavette for similar tenderness. For a lighter option, use chicken thigh pieces or mushrooms for a veggie alternative with good sear.
Butter – Use ghee for a nuttier richness or olive oil for a lighter finish.
Truffle Oil – Replace with mushroom-infused oil for earthiness or a drizzle of garlic oil for aromatic depth.
Garlic – Use roasted garlic for sweetness or garlic powder for convenience.
Parsley – Switch to basil for freshness or thyme for a deeper, woody note.
Chives – Use spring onions for a similar mild onion hit or finely diced shallots for a sharper bite.
Potatoes – Swap with cauliflower for a lighter mash or sweet potatoes for a richer, slightly sweet base.
Variations
Mushroom Truffle Steak Bites - Add finely chopped caramelised mushrooms to the mash and spoon a little over the steak. The earthiness enhances the truffle without overpowering it.
Chilli Truffle Steak Bites - Stir a pinch of chilli flakes or a splash of chilli oil into the finishing butter for a warm, subtle heat.
Parmesan Crust Steak Bites - Fold Parmesan into the mash and finish the steak with a dusting of finely grated Parmesan for extra umami richness.
Equipment
Potato masher
Storage
Store the steak and mash separately for best texture. Allow both to cool completely before refrigerating to prevent steam from creating excess moisture. Transfer the steak slices to an airtight container, spooning over any remaining butter so the meat stays juicy. The steak will keep well for up to three days. For the mash, place it in a sealed container and press baking paper or cling film directly onto the surface to prevent a dry layer from forming. Mash lasts three to four days.
To reheat steak, warm it very gently in a pan over low heat or in short microwave bursts, adding a touch of butter or stock to keep it tender. Avoid high heat, which can overcook and toughen the meat. Reheat mash in a saucepan or microwave with a splash of milk or cream, stirring until smooth and creamy again.
Top Tip
Sear the steak whole instead of cubing first. This guarantees a perfectly pink interior. Once rested, slice into bite-sized pieces and toss in warm truffle butter so the flavour clings without overcooking.
FAQ
Use a hot pan, avoid overcooking, and let the steak rest before slicing. Salt it 30–60 minutes beforehand for better tenderness, and toss the pieces in warm butter at the end rather than cooking them too long.
Yes - cooking it whole guarantees a perfectly pink center. Sear both sides, rest it, then slice into bites and finish in warm truffle butter. This prevents overcooking and keeps every piece tender and juicy.
Truffle tastes earthy, nutty, buttery, and slightly garlicky with a deep, luxurious aroma. It adds richness and depth rather than strong flavor, making dishes feel more indulgent with just a small amount.
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Recipe
Truffle Parmesan Steak & Mash
Equipment
- Large Pot
- frying pan
- Potato masher
Ingredients
For the steak
- 2 ribeye steaks
- 2 teaspoon olive oil
- 2 tablespoon butter
- Sea Salt and black pepper
- 2 sprigs fresh thyme
- 1 tablespoon fresh flat leaf parsley chopped
- 1 tablespoon chives chopped
- 2 cloves garlic
- 1 tablespoon truffle oil
For the potatoes
- 2 large potatoes or shop bought mash
- 1 tablespoon butter
- 100 ml milk
Instructions
- Remove the ribeye from the fridge and season generously with sea salt. Let the steaks sit so the salt can penetrate the meat. This gives a deeper flavour and a better crust later. Melt 1 tablespoon butter then stir in 1 clove minced garlic, chopped parsley and half of the truffle oil. This mixture becomes the finishing drizzle that defines the flavour of truffle parmesan steak and mash.2 ribeye steaks, 2 tsp olive oil, 2 tbsp butter, Sea Salt and black pepper, 2 cloves garlic, 1 tbsp truffle oil, 1 tbsp fresh flat leaf parsley
- If making mash from scratch, peel and quarter the potatoes and place them into salted water. Bring the pot to a boil and cook for 20-25 mins or until tender. While they boil, rub the salted steaks with black pepper and a touch of olive oil. Heat a large pan until very hot. Add the steaks and sear for a few minutes on each side. Add the remaining butter, a smashed garlic clove and the thyme. Baste the steaks repeatedly to coat them in aromatic butter. Rest the steaks once cooked to keep them juicy.2 sprigs fresh thyme, 2 large potatoes
- Drain the potatoes and mash them with butter and milk until smooth and creamy. The mash is the foundation of your truffle parmesan steak and mash so make it as soft and velvety as possible. Cube the rested steak for topping the mash with.1 tbsp butter, 100 ml milk
- Spread the mash onto plates and add the steak on top. Spoon over the warm truffle herb butter and finish with chopped chives. This final drizzle brings the whole truffle parmesan steak and mash together with maximum flavour. Top with optional salt and pepper to taste and enjoy!1 tbsp chives
