If there is one cut of beef that deserves a standing ovation the moment it hits the table — it’s beef tenderloin. Impossibly tender, deeply flavorful, and stunning to look at — this is the Easter main event that makes every single guest feel like they’re dining somewhere truly special. And here’s the best kept secret: it’s one of the easiest impressive roasts you’ll ever make.
Cast iron seared for that incredible crust, finished in the oven to your perfect temperature, and served with a fresh herbed steak sauce that takes the whole thing completely over the top. Let’s cook! 🔥
Why You’ll Love This Recipe
- The most tender cut of beef there is — it practically melts in your mouth 🥩
- Only 1g net carbs per serving — pure protein and fat perfection
- Cast iron seared — the crust is absolutely unreal 🔥
- Ready in under 45 minutes — impressive without the stress
- The herbed steak sauce — bright, fresh, and the perfect complement to rich beef
- Part of our Keto Easter Dinner Guide 🔗
The Macros
Per serving (based on 6 servings from a 3lb tenderloin):
| Per Serving | |
|---|---|
| Calories | ~420 |
| Net Carbs | ~1g |
| Protein | ~46g |
| Fat | ~24g |
Ingredients
(Serves 6 — based on a 3lb center-cut beef tenderloin)
🥩 For the Pepper Crust
- 3 lb center-cut beef tenderloin, trimmed and tied (ask your butcher to do this — they’re happy to help!)
- 3 tbsp whole black peppercorns, coarsely crushed
- 2 tsp kosher salt
- 1 tsp garlic powder
- 1 tsp dried rosemary, finely crushed
- 2 tbsp olive oil or avocado oil (avocado oil has a higher smoke point — perfect for cast iron searing!)
- 2 tbsp unsalted butter
🌿 For the Herbed Steak Sauce
- ¼ cup fresh flat-leaf parsley, finely chopped
- 2 tbsp fresh chives, finely chopped
- 1 tbsp fresh rosemary, finely chopped
- 1 tbsp fresh thyme leaves
- 3 tbsp olive oil
- 2 tbsp red wine vinegar
- 1 clove garlic, minced
- ½ tsp sea salt
- ¼ tsp black pepper
- Pinch of red pepper flakes (optional — adds a beautiful subtle heat!)
Instructions
Step 1 — Bring to Room Temperature
Remove the tenderloin from the refrigerator at least 45–60 minutes before cooking and let it come to room temperature. This is one of the most important steps — a cold center means uneven cooking. Don’t skip it! ⏱️
Step 2 — Make the Pepper Crust
Preheat your oven to 400°F. In a small bowl combine the crushed peppercorns, kosher salt, garlic powder, and dried rosemary. Rub the olive oil all over the tenderloin then press the pepper crust mixture firmly and evenly over every surface — really press it in! It should look beautifully coated and smell absolutely incredible at this point. 😄
Step 3 — Make the Herbed Steak Sauce
Combine all sauce ingredients in a small bowl and stir well to combine. Taste and adjust seasoning as needed. Set aside at room temperature — the flavors will develop beautifully as it sits. This sauce can be made up to 2 hours ahead for even more flavor! 🌿
Step 4 — Sear in Cast Iron 🔥
Heat a large oven-safe cast iron skillet over medium-high heat until smoking hot — about 3–4 minutes. You want it genuinely ripping hot for the best crust. Add the butter and immediately place the tenderloin in the skillet. Sear for 2–3 minutes per side on all four sides until a deep, gorgeous mahogany crust forms all over — about 10–12 minutes total. Don’t rush this step — that crust is everything! 🔥
Step 5 — Finish in the Oven ⏱️
Transfer the entire cast iron skillet directly to the preheated oven — no need to switch pans! Roast until the internal temperature reaches your desired doneness:
| Doneness | Internal Temp | Oven Time* |
|---|---|---|
| Rare | 120–125°F | 8–10 min |
| Medium Rare | 130–135°F | 12–15 min |
| Medium | 140–145°F | 16–20 min |
Times are approximate — always use a meat thermometer for accuracy!
A note on doneness: Beef tenderloin is best enjoyed at medium rare — it’s where the texture and flavor truly shine. If you like your steak well done, tenderloin is not the recommended cut — at that level of doneness the magic of this incredibly tender cut is sadly lost. Trust us on this one! 😊
Step 6 — Rest ⏱️
Remove from the oven and transfer to a cutting board. Cover loosely with aluminum foil and allow to rest for at least 10 minutes before carving — this allows the juices to redistribute throughout the meat for the most tender, juicy result. Do NOT skip resting — it makes an enormous difference!
Step 7 — Slice & Serve
Remove the kitchen twine and slice to your desired thickness — ¾ inch slices are ideal – slicing against the grain for maximum tenderness. Arrange beautifully on a platter and spoon the herbed steak sauce generously over the top. Garnish with fresh rosemary sprigs and flaky sea salt for a truly stunning Easter presentation. 🥩✨
What to Do With Leftover Tenderloin
Leftover beef tenderloin is one of life’s greatest gifts — and on keto it’s incredibly versatile! Store leftover slices in an airtight container in the refrigerator for up to 4 days — and when reheating wrap each slice in foil and warm in a 350°F oven for 10–15 minutes to keep it moist and tender.
Here are some of our favorite leftover ideas:
🥗 Cold Tenderloin Salad — thinly slice cold leftover tenderloin over arugula with shaved parmesan, lemon, olive oil, and a drizzle of the leftover herbed sauce. Absolutely incredible for next day lunch! 🌿
🥚 Tenderloin & Egg Scramble — dice leftover tenderloin and fold into scrambled eggs with fresh herbs and a sprinkle of flaky sea salt for the most luxurious keto breakfast you’ve ever had
🧀 Lettuce Wrap with Herbed Sauce — wrap thin slices of cold tenderloin in butter lettuce with a smear of cream cheese and a spoonful of leftover herbed sauce for a perfect no-cook next day lunch
🥣 Low Carb Beef & Veggie Bowl — slice and serve over cauliflower rice with roasted vegetables and a drizzle of the herbed sauce for a quick and satisfying leftover dinner
Cross-Link: Part of Our Keto Easter Series! 🐣
This Pepper-Crusted Beef Tenderloin is featured in our complete Keto Easter Dinner Guide — check it out for the full Easter feast!
Also in the Keto Easter Series:
- 🐑 Instant Pot Leg of Lamb
- 🍋 Keto Lemon Cake with Blackberry Mascarpone Frosting
- 🍓 Strawberry Cheesecake Fat Bombs
- 🍫 Keto Flourless Chocolate Cake
- 🥜 Keto Peanut Butter Chocolate Easter Eggs
Have you made beef tenderloin before? Drop a comment below — and if you’re a fellow lover of all things beef, I’d love to hear your favorite cut! 🥩👇
⚠️ Disclaimer: Macro counts are approximate and may vary based on specific cuts, sizes, and brands used. Always use an instant read thermometer to ensure your beef reaches a safe internal temperature.
Photo by Sergey Kotenev on Unsplash
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