Herb-Crusted Beef Tenderloin with Garlic Mashed Potatoes

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Perfectly seared beef tenderloin coated in a fragrant herb crust, served with creamy garlic mashed potatoes for a restaurant-quality dinner. This american-inspired beef ready in about 60 minutes pairs pounds Beef tenderloin, tablespoons Dijon mustard, tablespoons (minced) Fresh thyme for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 482 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.

★ 3.8 (12 ratings) Prep: 25 min Cook: 35 min Serves 4 American cuisine 482 cal/serving
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Ingredients

Instructions

  1. Step 1: Pat 1.5 pounds beef tenderloin dry with paper towels. Brush with 2 tablespoons Dijon mustard, then coat evenly with 2 tablespoons minced fresh thyme, 1 tablespoon minced fresh rosemary, and 3 minced garlic cloves; press to adhere.
  2. Step 2: Heat 1 tablespoon butter in a cast-iron skillet over medium-high until shimmering. Sear beef for 3 minutes per side until golden brown, then transfer to a wire rack on a baking sheet.
  3. Step 3: Roast at 400°F (200°C) for 15-18 minutes for medium-rare, then rest 10 minutes. While resting, boil 2 pounds cubed potatoes in salted water until fork-tender (15-20 minutes), then mash with 3 tablespoons butter, 1/4 cup heavy cream, 1 teaspoon salt, and 1/2 teaspoon black pepper until smooth and creamy.

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Frequently asked questions

How long does Herb-Crusted Beef Tenderloin with Garlic Mashed Potatoes take to make?

Total time is about 60 minutes (25 min prep + 35 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 Mashed Potatoes?

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 pounds beef tenderloin from drying out.

Can I substitute ingredients in Herb-Crusted Beef Tenderloin with Garlic Mashed Potatoes?

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 Mashed Potatoes 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.

What goes well with Herb-Crusted Beef Tenderloin with Garlic Mashed Potatoes?

American beef like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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