Sear-Perfect Herb-Crusted Ribeye with Truffle Mashed Potatoes
A steakhouse-worthy centerpiece featuring a crisp herb crust and velvety potatoes that embody culinary excellence through meticulous technique. This American-inspired beef recipe, ready in about 40 minutes, layers ribeye steak, fresh thyme leaves, fresh rosemary into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 1120 calories and feeds 2, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 1.5 lbs ribeye steak
- 3 tbsp fresh thyme leaves
- 2 tbsp fresh rosemary
- 1 tsp garlic powder
- 1.5 tsp coarse sea salt
- 1 tsp black pepper
- 3 tbsp unsalted butter
- 2 lbs potatoes
- 1/2 cup heavy cream
- 1/4 cup whole milk
- 1 tbsp truffle oil
The cast-iron skillet we’d sear this in → Best Cast Iron Skillets for 2026: Top Picks + Buying Guide
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Equipment for this recipe
Tools this recipe's steps call for, with a link to each on Amazon.
Instructions
- Step 1: Pat the ribeye steak dry with paper towels, then season both sides evenly with 1.5 tsp coarse sea salt, 1 tsp black pepper, and 1 tsp garlic powder.
- Step 2: Combine 3 tbsp fresh thyme leaves, 2 tbsp fresh rosemary, and 1 tsp garlic powder in a small bowl; press firmly onto both sides of the steak to create a herb crust.
- Step 3: Heat a cast-iron skillet over high heat until smoking, then add the steak. Sear undisturbed for 3 minutes until a deep brown crust forms, then flip and sear for 2 minutes for medium-rare.
- Step 4: Reduce heat to medium, add 3 tbsp unsalted butter to the skillet, and baste the steak with melted butter for 2 minutes, tilting the pan to coat evenly.
- Step 5: While steak rests, boil potatoes until fork-tender (20-25 minutes), then drain. Mash with 1/2 cup heavy cream, 1/4 cup whole milk, and 1 tbsp truffle oil until smooth and creamy.
- Step 6: Let steak rest for 10 minutes before slicing, then serve with a generous dollop of truffle mashed potatoes.








