How To Cook Small Filet Mignon In Oven

You want to know how to cook a perfect small filet mignon in oven. This simple oven recipe is your guide to getting a tender, juicy steak every single time, even if you’re starting with a smaller cut.

Filet mignon is known for its buttery texture. But because it’s lean, it can dry out if you’re not careful. The oven, used the right way, is a fantastic tool for cooking it evenly. This method combines stovetop searing with gentle oven finishing. It’s reliable and doesn’t require any special equipment.

Let’s get your steak dinner ready.

This is the core method. We’ll start with the essentials you need and then walk through each step. The key is preparation and paying attention to temperature.

What You’ll Need

Small Filet Mignon Steaks: Aim for 4-6 oz each, about 1.5 to 2 inches thick. Thinner steaks will cook too fast.
An Oven-Safe Skillet: Cast iron or heavy stainless steel is perfect. You’ll use it on the stove and then transfer it to the oven.
Cooking Oil with a High Smoke Point: Avocado oil, grapeseed oil, or refined olive oil are great choices.
Butter: For basting, which adds flavor and helps with browning.
Fresh Herbs & Garlic: Rosemary and thyme sprigs, plus a few garlic cloves (smashed).
Kosher Salt and Freshly Cracked Black Pepper: The fundamental seasonings.
Instant-Read Thermometer: This is non-negotiable for perfect doneness. It takes the guesswork out.
Tongs: For handling the steak without piercing it.
Wire Rack (optional but helpful): For letting the steak rest properly.

Step-by-Step Instructions

1. Prepare the Steak and Oven

Take your steaks out of the refrigerator at least 30 minutes before cooking. Letting them come to room temperature helps them cook more evenly. If you put a cold steak in a hot pan, the outside can overcook before the inside is done.

While the steak rests, pat it completely dry with paper towels. Moisture is the enemy of a good sear. Generously season all sides with kosher salt and black pepper. Don’t be shy here.

Preheat your oven to 400°F (200°C). Place your oven-safe skillet on the stove over medium-high heat. Let it get hot for a few minutes.

2. Sear the Steak

Add about a tablespoon of your high-heat oil to the hot skillet. It should shimmer but not smoke excessively. Carefully place the seasoned filets in the pan. You should hear a confident sizzle.

Do not move them! Let them sear undisturbed for 2-3 minutes. This builds a beautiful, flavorful crust. Use your tongs to peek at the bottom. When it’s a rich brown, flip the steaks. Sear the other side for another 2-3 minutes.

If your filets have a fat cap on the side, you can use your tongs to hold them upright to sear that edge for about 30 seconds. This renders the fat a bit.

3. Add Flavor and Transfer to Oven

Reduce the stove heat to medium. Add 2-3 tablespoons of butter to the skillet along with the herbs and garlic. As the butter melts, tilt the pan slightly. Use a spoon to continuously baste the steaks with the foaming butter for about a minute. This infuses incredible flavor.

Now, without removing the steaks, transfer the entire skillet to your preheated oven. This is where the gentle, even heat of the oven takes over.

4. Oven Finishing and Checking Temperature

The time in the oven depends entirely on thickness and your desired doneness. For a 1.5-inch filet at 400°F, here’s a rough guide:

Rare: 4-6 minutes (120-125°F internal)
Medium Rare: 6-8 minutes (130-135°F internal)
Medium: 8-10 minutes (140-145°F internal)

Important: These are estimates. Start checking the temperature with your instant-read thermometer a couple minutes before you think it’s done. Insert the probe into the side of the steak, into the thickest part.

Remember, the temperature will rise about 5 degrees while resting. So, remove the steak from the oven when it’s 5 degrees below your target.

5. The Crucial Resting Period

As soon as the steak hits its target temp, take the skillet out of the oven. Immediately transfer the filets to a wire rack or a warm plate. Do not slice into them yet.

Let them rest for at least 5-8 minutes. This allows the juices, which have been driven to the center by the heat, to redistribute throughout the entire steak. If you cut too soon, all those flavorful juices will end up on your plate, not in your meat.

While it rests, you can make a quick pan sauce with the drippings in the skillet if you like.

Pro Tips for the Best Results

Season Early: For even better flavor, salt your steaks up to 24 hours in advance and leave them uncovered on a rack in the fridge. This dries the surface more for a better sear and seasons the meat deeply.
Don’t Crowd the Pan: If cooking multiple steaks, make sure they aren’t touching in the skillet. They need space to sear properly, not steam.
Trust the Thermometer, Not the Clock: Oven temperatures vary, and steak thickness is never perfectly uniform. The thermometer is your most reliable tool.
Quality Matters: Starting with a good-quality filet mignon makes a significant difference. Look for steaks with a bright red color and some marbling if possible.

Internal Temperature Guide

This chart is your roadmap for doneness. Always measure at the thickest part of the steak.

Rare: 120-125°F (very red, cool center)
Medium Rare: 130-135°F (warm red center) – This is widely considered the ideal temp for filet mignon.
Medium: 140-145°F (warm pink center)
Medium Well: 150-155°F (slightly pink center)
Well Done: 160°F+ (little to no pink)

For well-done, be aware that a lean cut like filet can become quite dry. A lower oven temperature (like 325°F) after searing can help mitigate this somewhat.

Common Mistakes to Avoid

Skipping the Sear: The sear creates flavor through the Maillard reaction. Don’t just bake the steak; that crucial first step gives it character.
Using a Wet Steak: Failing to pat the steak dry guarantees a weak, steamy sear instead of a crisp crust.
Overcrowding the Pan: This drops the pan temperature and causes the steaks to release liquid and steam instead of searing.
Not Letting it Rest: Cutting immediately is the fastest way to end up with a dry steak, no matter how carefully you cooked it.
Poking the Steak Too Much: Use tongs to flip, not a fork. Every hole you poke lets juices escape.

What to Serve With Filet Mignon

A great side dish complements the rich, simple flavor of the steak. Here’s some classic ideas:

Potatoes: Creamy mashed potatoes, crispy roasted potatoes, or a classic baked potato.
Vegetables: Garlic sautéed mushrooms, roasted asparagus, green beans almondine, or a simple arugula salad.
Sauces (Optional): A dollop of compound butter (like blue cheese or herb butter), a red wine reduction, or a classic béarnaise sauce.

Alternative Cooking Methods

While the sear-and-oven method is excellent, you have other options.

Reverse Sear

This method is fantastic for thicker cuts. You slowly bake the steak in a low oven (250°F) until it’s about 15 degrees below your target temp. Then, you sear it in a screaming hot skillet for about 60 seconds per side. It gives you incredibly even doneness edge-to-edge and a perfect crust.

Broiling

You can cook the steak entirely under the broiler. Place it on a broiler pan a few inches from the element. Watch it closely and flip halfway through. It’s faster but requires more attention to prevent burning.

FAQ Section

How long do you cook a small filet mignon in the oven?

After searing, a 1.5-inch filet mignon usually needs 4-10 minutes in a 400°F oven, depending on your desired doneness. Always use a meat thermometer for accuracy.

Should you cover filet mignon in the oven?

No, you should not cover it. Covering it will trap steam and ruin the crispy crust you worked hard to create during searing. You want dry, direct heat in the oven.

What is the best temperature to cook filet mignon?

For the method described, 400°F is ideal. It’s hot enough to continue cooking the steak efficiently without burning the butter and herbs. For a reverse sear, a much lower oven temperature (around 250°F) is used.

Can I cook frozen filet mignon in the oven?

It’s not recommended. You’ll get a very uneven cook with an overdone exterior and cold interior. For best results, always thaw your steak completely in the refrigerator first and then bring it to room temperature before cooking.

Why is my filet mignon tough?

Filet mignon is naturally tender. Toughness usually comes from overcooking. Because it’s lean, it goes from tender to dry and chewy quickly once past medium doneness. Using a thermometer prevents this.

Do you flip steak in the oven?

With the method where you sear first and then finish in the oven, you do not need to flip the steak in the oven. The ambient heat cooks it evenly on all sides.

Storing and Reheating Leftovers

Leftover filet mignon? It’s rare, but it happens. Let the steak cool completely, then store it in an airtight container in the refrigerator for up to 3 days.

To reheat, avoid the microwave—it will make it rubbery. Instead, place the steak on a wire rack over a baking sheet and warm it in a 250°F oven until just heated through, about 10-15 minutes. You can also slice it thin and quickly warm the slices in a pan with a little broth.

Cooking a small filet mignon in the oven is a straightforward process that yields impressive results. The combination of a hot sear and gentle oven heat gives you control from edge to center. Remember the key steps: dry the steak, get your pan hot, sear well, use a thermometer, and always let it rest. With a little practice, this simple oven recipe will become your go-to for a reliable, restaurant-quality steak at home. The next time you have a special dinner planned, you’ll know exactly what to do.