Chimichurri Beef Tenderloin
I grew up in a house where meat off the grill meant one thing: thick, sweet BBQ sauce slathered on everything. It was summer in a bottle. It was also, as it turned out, basically caramel with a smokiness complex.
When I started reading labels and sugar and I had our famous falling out, BBQ sauce was one of the first things to go. And that's when I discovered chimichurri — the Argentinian herb sauce that's been doing what BBQ sauce only dreamed of doing, without a gram of added sugar. It cuts through the richness of the beef like nothing else. Fresh, zesty, alive.
Make the chimichurri at least an hour before you need it. Let the garlic and vinegar get properly acquainted with the herbs. It makes a noticeable difference, and patience is always rewarded in this kitchen.
*Per USDA FoodData Central
The Swap Snapshot
| Typical Version | The Sugar Swap Version | Sugar per serving* |
|---|---|---|
| Steak with BBQ Sauce Commercial BBQ sauce, sugar, corn syrup |
Beef with Herb Chimichurri Fresh parsley, garlic, red wine vinegar, olive oil |
16g→1g |
*Based on USDA FoodData Central values. The Sugar Swap is not medical or nutritional advice.
Ingredients
Serves 2 · Scale as needed
- 6 oz beef tenderloin
- ½ cup ⇄ fresh parsley, finely chopped ⇄ the swap
- 2 cloves ⇄ garlic, minced ⇄ the swap
- 2 tbsp red wine vinegar
- ¼ cup extra virgin olive oil
- ½ tsp dried oregano
- ¼ tsp red pepper flakes
- to taste salt and black pepper
Instructions
-
1
In a small bowl, whisk together parsley, garlic, red wine vinegar, olive oil, oregano, and red pepper flakes. Let it sit for at least 30 minutes — longer if you can.
-
2
Pat the beef tenderloin dry and season generously with salt and pepper on all sides.
-
3
Heat a heavy skillet over high heat until very hot. Sear the beef for 4–5 minutes per side for medium-rare.
⇄ Swap NoteBecause there’s no sugar in the chimichurri, you won’t get that sticky caramelised char — but you will get a clean, crust-focused sear. Let the meat do its thing.
-
4
Remove from heat and rest for 5 minutes. Slice against the grain and serve with a generous spoonful of chimichurri over the top.
Why I Made This Swap
Commercial BBQ sauces are one of the biggest hidden sugar sources in a meal — often containing 10–16g of sugar per serving from corn syrup, molasses, and added sweeteners. A fresh herb chimichurri delivers far more complex flavour through acid, aromatics, and heat — with zero added sugar. The vinegar does the job the sugar was faking.
Common Mistakes
- Using bottled herb sauces. Many pre-made chimichurris contain added sugar and preservatives. Always make it fresh — it takes five minutes and the difference is enormous.
- Skipping the rest. Beef needs to rest before cutting or all the juices escape. Five minutes minimum. Use the time to plate everything else.
- Using dried parsley. Fresh only. Dried parsley in chimichurri is not chimichurri — it’s a green paste with existential issues.
Storage
Leftover chimichurri keeps beautifully in a sealed jar in the fridge for up to 3 days. It’s excellent on eggs, on roasted veg, on literally everything. The beef is best eaten the same day.
Nutrition per serving
*Per USDA FoodData Central · Typical version: 16g sugar · The Sugar Swap is not medical or nutritional advice.
Frequently Asked Questions
Can I use a different cut of beef?
Absolutely — ribeye, sirloin, and flank steak all work beautifully. Tenderloin is particularly elegant with this sauce, but use what you love.
Can I use cilantro instead of parsley?
Yes, or a mix of both. Cilantro gives a more South American flavour profile. Avoid it if you have that genetic disposition to taste soap — you know who you are.
Can I make this on a barbecue?
Perfect for the grill. Cook over high direct heat, same timings. The chimichurri is especially good against a proper char from the flames.
