Perfectly Seared Thin-Cut Filets, Done Right
If you have ever cooked grass-fed steak the same way you cook grocery store beef and felt slightly disappointed… this post is for you.
Grass-fed beef is leaner, more nutrient dense, and more flavorful than conventional beef. But because it has less intramuscular fat, it needs a slightly different approach in the pan. When cooked properly, it is tender, rich, and deeply satisfying. When overcooked, it can turn dry and tough.
Today I am walking you through exactly how I seared two smaller, thinner-cut filet mignons from our farm here in Cocoa, Florida. Mine came out absolutely delicious.
I personally love my steak rare. Medium rare is also great. I do not recommend cooking grass-fed filet to well done. The lower fat content simply does not handle high internal temperatures as well, and you will lose tenderness.
Let’s get into it.
Why Grass-Fed Steak Cooks Differently
Grass-fed beef:
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Is leaner than grain-finished beef
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Has a lower overall fat content
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Cooks faster
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Benefits from slightly lower internal temps
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Shines with simple seasoning
Because there is less fat to protect the meat during long cooking, high heat for a short time is your friend.
The Simple Seared Grass-Fed Filet Recipe
Ingredients
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2 small thin-cut grass-fed filet mignons
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Salt
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Black pepper
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Tallow or lard for searing
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Butter
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Fresh garlic
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Green onion
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Smoked paprika
Step 1: Dry, Salt, and Rest
I started by patting the filets completely dry with paper towels. This step is critical for good browning.
Then I generously salted both sides and placed them uncovered in the fridge while I prepared the rest of our meal. Letting them rest like this helps:
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Draw moisture to the surface
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Reabsorb seasoning
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Dry the exterior slightly
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Improve crust development
If you have 30 minutes, great. If you have a couple hours, even better.
Before cooking, I should have patted them dry one more time. I forgot, and I did lose a little of that deep crust you get when the surface is very dry. They were still incredibly flavorful, but that extra dry step really helps.
Step 2: Get the Pan Hot
I melted a spoonful of tallow in a cast iron pan over high heat.
How do you know the pan is ready?
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The fat should shimmer
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It should move quickly and look almost glassy
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A drop of water should sizzle and evaporate immediately
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You should see faint wisps of smoke
If the pan is not hot enough, you will steam the steak instead of searing it.
Step 3: Sear
Because my filets were on the thinner side, I opted for a quick, hard sear.
For thin filets around 1 inch thick:
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About 1 minute per side for rare
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1 to 1.5 minutes per side for medium rare
For thicker filets around 1.5 to 2 inches thick:
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2 to 3 minutes per side
If you are working with a thicker cut, we recommend using a reverse sear.
What Is a Reverse Sear?
A reverse sear means you:
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Slowly bring the steak up to temperature in the oven at around 250 degrees
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Pull it out when it is about 10 degrees below your target internal temp
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Finish with a very hot, quick sear in a pan
This method gives you even doneness edge to edge with a beautiful crust.
But for thinner cuts like mine, a quick direct sear keeps the center at that perfect rare temperature.
Step 4: Butter Baste
When I flipped the steak to the second side, I added butter that I had infused with:
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Fresh garlic
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Green onion
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Smoked paprika
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Salt
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Pepper
As the butter melted, I tilted the pan slightly and spooned the butter over the steaks repeatedly. This adds flavor and helps finish cooking the top gently.
You can absolutely:
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Use rosemary and thyme instead
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Keep it simple with just salt and pepper
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Skip the butter entirely
Grass-fed beef truly does not need much.
Step 5: Rest
I removed the steaks from heat and let them rest for several minutes.
Resting allows:
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The juices to redistribute
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The muscle fibers to relax
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The interior to finish gently cooking
Then I sliced and served with the rest of our meal.
It was so good.
Tender. Rich. Clean flavor. No heavy grease. Just pure beef.
A Note on Doneness
For grass-fed filet, ideal internal temperatures are:
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Rare: 120 to 125°F
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Medium rare: 130 to 135°F
Once you move beyond 140°F, the leaner structure begins to tighten significantly. That is why well done grass-fed filet often feels dry.
If you truly prefer well done, consider using cuts with more connective tissue and cooking low and slow instead.
Final Thoughts
Cooking grass-fed steak is simple once you understand it:
Dry surface.
Hot pan.
Short cook time.
Rest.
That is it.
If you try this method with our grass-fed beef from Cocoa, Florida, I would love to hear how it turns out. Reach out anytime with your grass-fed cooking questions. We are always happy to help you get the most out of your local meat.
And if you ever want the pasta and lobster recipe that went alongside this filet… just let me know.