Herb-Crusted Beef Tenderloin with Garlic Cauliflower Mash
A luxurious keto main course featuring perfectly seared beef tenderloin with a fragrant herb crust, served atop creamy garlic cauliflower mash. This american-inspired beef (high-protein, low-carb) ready in about 50 minutes pairs beef tenderloin, olive oil, finely chopped fresh rosemary for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 580 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. 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 beef tenderloin
- 2 tbsp olive oil
- 2 tsp finely chopped fresh rosemary
- 1 tbsp finely chopped fresh thyme
- 4 cloves minced garlic
- 2 cups chopped florets cauliflower
- 3 tbsp unsalted butter
- 1/4 cup heavy cream
- 1 tsp sea salt
- 1/2 tsp black pepper
Instructions
- Step 1: Pat 1.5 lbs beef tenderloin dry with paper towels, then rub with 2 tbsp olive oil and season evenly with 1 tsp sea salt and 1/2 tsp black pepper.
- Step 2: In a small bowl, mix 2 tsp chopped rosemary, 1 tbsp chopped thyme, and 4 minced garlic cloves. Press this mixture firmly onto all sides of the beef.
- Step 3: Heat a cast-iron skillet over medium-high heat until shimmering, then add the beef and sear undisturbed for 3 minutes per side until deeply browned.
- Step 4: Transfer skillet to a preheated 400°F oven and roast for 12-14 minutes for medium-rare, or until internal temperature reaches 125°F.
- Step 5: While beef rests, steam 2 cups chopped cauliflower florets until fork-tender (about 10 minutes), then transfer to a food processor.
- Step 6: Add 3 tbsp unsalted butter and 1/4 cup heavy cream to the cauliflower, processing until smooth and creamy, seasoning with additional salt and pepper to taste.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Herb-Crusted Beef Tenderloin with Garlic Cauliflower Mash take to make?
Total time is about 50 minutes (25 min prep + 25 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Herb-Crusted Beef Tenderloin with Garlic Cauliflower Mash?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep beef tenderloin from drying out.
Can I substitute ingredients in Herb-Crusted Beef Tenderloin with Garlic Cauliflower Mash?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Herb-Crusted Beef Tenderloin with Garlic Cauliflower Mash for a different number of people?
The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
Is Herb-Crusted Beef Tenderloin with Garlic Cauliflower Mash high-protein?
Yes — this recipe is tagged high-protein, low-carb based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.
What others are saying
- ★★★★☆
Tasty recipe. I'd add a bit more seasoning next time.
- ★★★★☆
Tasty recipe. I'd add a bit more seasoning next time.
- ★★★☆☆
Okay for a quick meal. I've had better beef dishes though.
