Grilled Beef Tenderloin Crostini with Béarnaise Sauce
Grilled Beef Tenderloin Crostini with Béarnaise Sauce combines tender, herb-infused beef, crispy crostini, and a velvety tarragon-laced béarnaise sauce for a showstopping appetizer. Perfect for holiday gatherings or dinner parties, this dish balances simplicity with sophistication, ensuring every bite melts in your mouth. Fresh ingredients and a touch of culinary flair make it a crowd favorite.
✔ Ingredients (Serves 12-16 crostini) :
For the Beef Tenderloin:
1 lb (450g) beef tenderloin, trimmed
1 tsp sea salt
1 tsp freshly cracked black pepper
2 tbsp olive oil
2 sprigs fresh rosemary (or 1 tsp dried)
2 sprigs fresh thyme
For the Béarnaise Sauce:
3 large egg yolks
½ cup (1 stick) unsalted butter, melted
1 tbsp white wine vinegar
1 tbsp fresh tarragon, finely chopped
1 tsp shallot, minced
¼ tsp salt
¼ tsp black pepper
For the Crostini:
1 French baguette, sliced into ½-inch pieces
2 tbsp olive oil
¼ tsp sea salt
Garnish (optional):
Microgreens or fresh parsley
Lemon zest
✔ Directions :
1. Prepare the Beef Tenderloin:
Let the beef sit at room temperature for 30 minutes. Pat dry and season with salt and pepper.
Heat olive oil in a grill pan or skillet over medium-high heat. Add rosemary and thyme, then sear the beef for 3–4 minutes per side for medium-rare (internal temp: 130°F). Rest for 10 minutes before slicing thinly.
2. Make the Béarnaise Sauce:
In a blender, combine egg yolks, vinegar, shallot, and tarragon. Blend until smooth.
With the blender running, slowly drizzle in melted butter until emulsified. Season with salt and pepper. Keep warm in a heatproof bowl over simmering water.
3. Toast the Crostini:
Preheat the oven to 375°F. Brush baguette slices with olive oil, sprinkle with salt, and bake for 8–10 minutes until golden and crisp.
4. Assemble:
Top each crostini with a slice of beef. Drizzle with béarnaise sauce and garnish with herbs or lemon zest. Serve immediately.
Prep Time: 30 minutes | Cook Time: 20 minutes | Calories: 185 kcal per crostini

✔ Frequently Asked Questions :
Can I substitute dried tarragon for fresh?
Yes, but use ⅓ the amount (1 tsp dried = 1 tbsp fresh). Fresh tarragon offers a brighter flavor.Can I make the béarnaise sauce ahead?
Prepare it 1 hour in advance and keep warm. Reheat gently to avoid curdling.What wine pairs well with this dish?
A dry white wine like Sauvignon Blanc complements the béarnaise’s acidity.How do I prevent overcooking the beef?
Use a meat thermometer and remove it at 125°F—it’ll rise to 130°F while resting.Can I use gluten-free bread?
Absolutely! Opt for a crusty gluten-free baguette for the crostini.
✔ Tools You’ll Need :
Grill pan or cast-iron skillet
Meat thermometer
Blender or immersion blender
Baking sheet
✔ Tips for Success :
Rest the beef to lock in juices.
Clarify butter for a smoother béarnaise (skim off milk solids).
Toast crostini last to maintain crispness.
Use fresh herbs for vibrant flavor.
✔ Allergy Information :
Contains: Dairy (butter), eggs, gluten (baguette).
Substitute: Use gluten-free bread and vegan butter for dairy-free options.

✔ Conclusion :
Elevate your next gathering with these Grilled Beef Tenderloin Crostini—a symphony of tender beef, buttery béarnaise, and golden crostini. Whether for a festive appetizer or an elegant dinner starter, this recipe promises to dazzle. Share your creations with loved ones, and don’t forget to tag your culinary triumphs! 🙂