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Sliced medium-rare steak resting on a mound of creamy mashed potato
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Steak & Buttery Mash

Pan-seared ribeye with a garlic-thyme butter baste, over mash that is more butter than potato.

35 min totalEasyServes 2Beef · Classic · Date night

Ingredients

Scaled for 2 people

  • Ribeye steak (2.5cm / 1in thick)2 steaks
  • Floury potatoes (Maris Piper / Russet)600 g
  • Butter100 g
  • Whole milk80 ml
  • Garlic cloves3 cloves
  • Fresh thyme4 sprigs
  • Neutral oil1 tbsp
  • Flaky sea saltto taste
  • Black pepperto taste

Method

  1. Take the steaks out of the fridge 45 minutes before cooking. A cold centre is the #1 cause of a grey, overdone crust. Pat them bone dry with kitchen paper.
  2. Peel and quarter the potatoes. Start them in cold salted water, bring to a boil, then simmer 18–20 min until a knife slides through with no resistance.
  3. Salt the steaks generously on both sides just before they hit the pan. Get a heavy skillet (cast iron if you have it) ripping hot with the oil — it should be shimmering, almost smoking.
  4. Lay the steaks away from you. Do not move them for 2 minutes. Flip, then add the butter, smashed garlic and thyme. Tilt the pan and spoon the foaming butter over the steak continuously.
  5. Cook to your target temperature (see the doneness chart below), then move to a board or warm plate.
  6. Rest for at least 5 minutes, loosely tented with foil. Skipping this dumps all the juice onto your board.
  7. Drain the potatoes and let them steam-dry in the empty pan for 1 min. Rice or mash them, then beat in the butter first, then the warm milk. Season hard — mash needs more salt than you think.
  8. Slice the steak against the grain, spoon over any resting juices plus the pan butter, and serve on the mash.
Chef’s note

Buy one thick steak instead of two thin ones for 2 people and slice it to share — thick steaks are far more forgiving.

Steak doneness — per side, 2.5cm / 1in thick

Blue

46–49°C  ·  115–120°F

Seared crust, cool and near-raw red centre. Only worth it on very fresh, thick-cut steak.

Per side1 min
Rest5 min minimum
Touch testFeels like the base of your relaxed thumb — very soft.

Rare

50–52°C  ·  122–126°F

Bright red centre, warm rather than hot, very juicy and soft throughout.

Per side1½–2 min
Rest5 min minimum
Touch testSoft with a slight spring.
Recommended

Medium rare

54–57°C  ·  130–135°F

The default for a reason. Warm red-pink centre, maximum juiciness, fat has started to render.

Per side2–3 min
Rest5 min minimum
Touch testSprings back gently, like your palm below the thumb when touching thumb to middle finger.

Medium

60–63°C  ·  140–145°F

Hot pink centre with a wider brown band. Still juicy, noticeably firmer bite.

Per side3–4 min
Rest5 min minimum
Touch testFirm with a definite bounce.

Medium well

65–68°C  ·  150–155°F

A faint blush of pink at the very centre. Getting dry — go for a fattier cut if you cook to here.

Per side4–5 min
Rest5 min minimum
Touch testFirm, very little give.

Well done

71°C+  ·  160°F+

No pink, fully firm. Use a thinner cut and lower heat, and rest it just as long.

Per side5–6 min
Rest5 min minimum
Touch testHard, no give at all.
Carryover

Pull the steak 3°C / 5°F below your target — it keeps cooking while it rests. Full guide on the Steak guide page.