Table of Contents
Introduction about Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions
Are you looking for the perfect appetizer that will impress your guests? Look no further! This Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions is the ultimate crowd-pleaser. Imagine tender, juicy steak topped with creamy horseradish sauce and sweet caramelized onions, all served on crispy baguette slices. Doesn’t that sound tempting?
The beauty of this recipe lies in its simplicity and elegance. Whether you’re hosting a dinner party, having a special celebration, or just want to elevate your weekday dinner, these little bites are sure to steal the spotlight. They are not only delicious but also incredibly easy to prepare. Plus, who can resist that rich combination of flavors?
Key Benefits of Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions
Why you’ll love this recipe
- Delicious Flavor: The combination of steak, horseradish, and caramelized onions creates an explosion of flavor in each bite.
- Quick and Easy: With straightforward steps, this recipe can be completed in under an hour, making it suitable for busy weeknights or unexpected guests.
- Family-Friendly: This dish is great for all ages; kids and adults alike love the taste of steak on crispy bread.
- Budget-Friendly: Filet mignon or tenderloin provides a delicious and economical option, especially for special occasions.
- Versatile Appetizer: Perfect for any gathering, from casual get-togethers to formal dinners, this dish adapts to any occasion.
- Customizable: Feel free to tweak the toppings or sauces based on personal preferences for endless variations.
What makes it stand out
What truly sets this crostini apart is its adaptability. You can easily customize the toppings to suit the season or your guests’ preferences. Using seasonal herbs or swapping the caramelized onions with sautéed mushrooms can give the dish a fresh twist. The creamy horseradish sauce adds a unique flavor that elevates this classic appetizer into a gourmet experience.
Ingredients for Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions
Complete ingredient list with measurements
To create your Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions, gather the following ingredients:
- 1 pound filet mignon or tenderloin
- Salt and black pepper (to taste)
- 2 tablespoons unsalted butter
- 1 teaspoon garlic powder
- 1 teaspoon dried thyme
- Baguette (thinly sliced)
- Olive oil (for brushing)
- 1/2 cup mayonnaise
- 2 tablespoons horseradish (prepared)
- 1 tablespoon Dijon mustard
- 1 tablespoon lemon juice
- Salt and black pepper (to taste)
- 2 tablespoons unsalted butter (for shallots)
- 2 large shallots (thinly sliced)
- 1 tablespoon balsamic vinegar
- 1 tablespoon brown sugar
- Salt and black pepper (to taste)
Substitutes and alternatives
If you’re looking for alternatives based on dietary needs or preferences, consider these options:
- Steak Substitutes: Swap the filet mignon with flank steak or sirloin, which are more affordable and also flavorful.
- Dairy-Free Options: Use vegan mayonnaise to create a dairy-free version of the horseradish sauce.
- Gluten-Free Options: Opt for gluten-free bread or crackers if you need a gluten-free twist.
How to Make Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions – Step-by-Step Directions
Step 1 – Season the steak
Begin by seasoning your 1 pound filet mignon or tenderloin with salt, black pepper, garlic powder, and dried thyme. Ensure that the steak is evenly coated on all sides for maximum flavor. Let it rest for at least 30 minutes to absorb the spices.
Step 2 – Prepare the horseradish sauce
In a small bowl, mix together 1/2 cup mayonnaise, 2 tablespoons horseradish, 1 tablespoon Dijon mustard, and 1 tablespoon lemon juice. Season this mixture with salt and black pepper to taste. Once combined, refrigerate it until you are ready to assemble your crostini.
Step 3 – Caramelize the shallots
In a skillet over medium heat, melt 2 tablespoons of unsalted butter. Add 2 large shallots sliced thinly. Sauté until softened, stirring occasionally, about 5–7 minutes. Next, introduce 1 tablespoon of balsamic vinegar, 1 tablespoon of brown sugar, salt, and black pepper. Continue to cook, stirring frequently, until the shallots are golden brown and caramelized, approximately 20–30 minutes. Remove from heat and set aside.
Step 4 – Cook the steak
Heat olive oil in a separate skillet over medium-high heat. Once hot, add the seasoned steak and cook until it reaches your desired doneness. For medium-rare, you’ll want to cook it for about 4 minutes per side. Once cooked, remove from heat and let the steak rest for 10 minutes to ensure juiciness.
Step 5 – Preheat the oven
Preheat your oven to 375°F (190°C) while the steak is resting. This will prepare it for toasting the baguette slices.
Step 6 – Toast the baguette
Brush thinly sliced baguette with olive oil and arrange them on a baking sheet. Place them in the preheated oven and toast for about 5–7 minutes, or until they are golden brown and crisp.
Step 7 – Slice the steak
After resting, slice the steak into thin strips. It’s easier to achieve uniform slices when the meat has relaxed, and it keeps the juices inside.
Step 8 – Assemble the crostini
Spread a layer of the creamy horseradish sauce on each toasted baguette slice. Top it generously with a slice of the cooked steak and finish with a spoonful of the caramelized shallots.
Step 9 – Garnish
Arrange the assembled steak crostini on a serving platter. To add a touch of freshness, garnish with fresh thyme or parsley.
Step 10 – Serve immediately
Enjoy your delightful Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions while they are warm and fresh!
Serving Suggestions for Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions
Best occasions to serve this dish
These crostini are perfect for various occasions:
- Family Dinners: Serve as an appetizer before your main course to wow your family.
- Holiday Gatherings: This recipe shines during festive occasions like Thanksgiving and Christmas.
- Game Day Parties: They’re ideal finger food for watching the big game.
- Cocktail Parties: Impress guests with these delicious bites crafted to complement cocktails beautifully.
What to serve with it
Pair your steak crostini with seasonal accompaniments:
- Beverages: A nice red wine, such as Cabernet Sauvignon, complements the steak’s richness beautifully.
- Sauces: Consider a balsamic reduction or extra horseradish sauce on the side for those who love a bit more kick.
- Side Dishes: A simple side salad with mixed greens can balance out the richness of the crostini.
Storing Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions Properly
Best storage practices
If you have leftover steak crostini, here’s how to store them properly:
- Refrigerator: Place the crostini components (steak, sauce, and shallots) separately in airtight containers. They can be stored in the fridge for up to 2 days.
- Baguette Slices: It’s best to store toasted baguette slices in a paper bag to keep them crisp for a short period, but they can become soggy quickly.
Reheating and freezing tips
- Reheating: When ready to enjoy, reheat the steak and shallots gently in a skillet. Toast fresh baguette slices as needed.
- Freezing: While you can freeze the cooked steak, it’s best consumed fresh. If freezing, slice or cube the steak before freezing for convenience later.
Tips & Tricks for Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions
Mistakes to avoid
- Overcooking the steak: Make sure to monitor cooking time closely to prevent the steak from becoming tough and dry.
- Not resting the steak: Always let the steak rest before slicing to allow the juices to redistribute.
- Soggy Crostini: Avoid topping the crostini until you’re ready to serve to maintain their crunch.
Extra tips for better results
- Use fresh herbs: Fresh thyme or chives as a garnish can add a lovely aromatic flavor and visual appeal.
- Experiment with toppings: Consider adding pickled vegetables or herbs for extra flavor and texture.
Recipe Variations of Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions
Creative twists
- Seasonal Flavors: Incorporate seasonal ingredients like roasted red peppers or sun-dried tomatoes for a refreshing change.
- Holiday Spins: Add cranberry sauce or maple syrup to the horseradish sauce for a unique holiday flavor.
Dietary adjustments
- Gluten-Free: Swap baguette with gluten-free crackers or tortilla chips.
- Vegan: Use a plant-based steak alternative and vegan mayonnaise to create a delicious vegan version.
Conclusion about Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions
In summary, this Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions is a wonderful option for any occasion. Its ease of preparation, combined with the rich flavors and textures, makes it a standout appetizer that everyone will love. Don’t hesitate to try it at your next gathering, and be sure to comment below on how it turned out! If you’re interested in exploring more delicious recipes
FAQs about Steak Crostini with a Creamy Horseradish Sauce and Caramelized Onions
What if it doesn’t turn out right?
Don’t worry if things don’t go as planned! If the steak is overcooked, consider slicing it thinly and incorporating it into a warm salad. If the sauce is too thin, adding a bit more mayonnaise can help thicken it up.
Can I prepare it ahead of time?
Absolutely! You can caramelize the shallots and prepare the horseradish sauce ahead of time. Just add the steak and assemble the crostini right before serving for the best freshness.
What are the best ingredient substitutions?
Some great substitutes include using a leaner cut of beef like sirloin or swapping the mayonnaise for Greek yogurt for a healthier option.
How long can it be stored?
Stored properly in an airtight container, the components can last in the refrigerator for up to 2 days. Just remember, the toasted baguette will start to lose its crispiness.
Can I use store-bought dough or crust?
Yes! You can use store-bought crostini or even pre-made bruschetta as a shortcut if you’re short on time.
Is this recipe kid-friendly or family-appropriate?
Definitely! The flavors are appealing to kids, and you can adjust the horseradish for milder tastes if needed.
Can I make this recipe allergen-free?
Yes! By substituting gluten-free bread and using dairy-free mayonnaise, you can easily adapt this recipe to suit allergen restrictions.

Steak Crostini with Creamy Horseradish Sauce and Caramelized Onions
Ingredients
For the Steak
- 1 pound filet mignon or tenderloin Can substitute with flank steak or sirloin.
- Salt and black pepper To taste
- 2 tablespoons unsalted butter For cooking the shallots
- 1 teaspoon garlic powder
- 1 teaspoon dried thyme
For the Sauce
- ½ cup mayonnaise You can substitute with vegan mayonnaise for a dairy-free option.
- 2 tablespoons horseradish (prepared)
- 1 tablespoon Dijon mustard
- 1 tablespoon lemon juice
- Salt and black pepper To taste
For the Baguette
- Baguette (thinly sliced) Brush with olive oil for toasting.
- Olive oil For brushing
For the Caramelized Shallots
- 2 large shallots (thinly sliced)
- 1 tablespoon balsamic vinegar
- 1 tablespoon brown sugar
- Salt and black pepper To taste
Instructions
Preparation
- Season the steak with salt, black pepper, garlic powder, and dried thyme. Let it rest for at least 30 minutes.
- In a bowl, combine mayonnaise, horseradish, Dijon mustard, and lemon juice. Season with salt and black pepper, and refrigerate.
- Melt butter in a skillet, add shallots, and sauté until softened. Add balsamic vinegar, brown sugar, and seasoning. Cook until caramelized.
Cooking
- Cook the seasoned steak in a skillet over medium-high heat until desired doneness (about 4 minutes per side for medium-rare). Let it rest for 10 minutes.
- Preheat oven to 375°F (190°C). Brush baguette slices with olive oil and toast in the oven for 5–7 minutes until golden.
Assembly
- Slice the rested steak thinly and spread horseradish sauce on each toasted baguette slice.
- Top with steak slices and caramelized shallots, then garnish with fresh thyme or parsley.
- Serve immediately.