Crispy beef crostini topped with creamy horseradish sauce and sweet caramelized onions for the perfect fancy‑but‑easy party bite.
Beef Crostini with Horseradish Cream is one of those appetizers that feels beautifully elevated but comes together with almost no effort. Each slice of golden, olive‑oil‑toasted baguette is topped with tender beef, a creamy mustard‑horseradish sauce, and sweet caramelized onions. The combination is crunchy, savory, tangy, and rich — like a tiny steakhouse bite you can serve right from your own kitchen.
This recipe is a favorite for holidays, dinner parties, and family gatherings because it’s simple, reliable, and always impressive. Using pre‑cooked brisket keeps things easy, and the zippy horseradish cream ties everything together. Add a sprinkle of fresh herbs, and you’ve got a platter of warm, cozy, crowd‑pleasing bites that disappear fast.
Why You’ll Love This Beef Crostini Recipe:
- Fancy without the fuss — restaurant‑worthy flavor with simple steps.
- Perfect for gatherings — easy to assemble and serve.
- Balanced flavors — crunchy, creamy, savory, and sweet.
- Make‑ahead friendly — onions and sauce can be prepped early.
- Flexible — works with brisket, roast beef, or leftover steak.
Tips for the best Beef Crostini:
- Use pre‑cooked brisket for the easiest, most flavorful option. I get mine from Costco!
- Choose creamy horseradish for a balanced, approachable sauce. I use this Inglehoffer brand cream style horseradish which is pretty inexpensive at Walmart.
- Watch the broiler — crostini toast quickly.
- Slice evenly so each piece toasts and holds toppings well.
- Prep ahead by making the onions and sauce earlier in the day. You can reheat the onions in the frying pan before serving.
Ingredients:
- 1 small sweet onion
- 2 Tbsp butter
- 3 Tbsp mayo
- 3 Tbsp sour cream
- 2 Tbsp creamy horseradish
- 2 Tbsp Dijon mustard
- 1 loaf of baguette bread sliced in to at least 24 pieces (I do about 1/2-3/4″ thick)
- 2 Tbsp olive oil
- 24 small slices of beef (can use cooked brisket or sliced cooked roast beef)
- Fresh chives or parsley for garnish
Instructions:
- For the grilled onions: Melt the butter over medium-high heat in a larger frying pan. Slice the onion in half, then in to thin slices.
- Add the sliced onions to the melted butter, turn heat down to medium, toss and let caramelize slowly, tossing frequently for at least 15-20 minutes until beautifully caramelized. Set aside.
- For the horseradish cream: In a small bowl, combine the mayo, sour cream, creamy horseradish and Dijon mustard. Set aside.
- For the baguette bread: Slice your baguette bread in to 1/2-3/4″ thick pieces. Place on a baking sheet, drizzle with olive oil and broil for 2-3 minutes on high or until golden brown.
- To assemble: Place the golden brown bread on a platter. Smear some of the horseradish cream on each slice, place some brisket or a slice of roast beef on each slice. Add a good size pinch of grilled onions to the top, then garnish with some chopped fresh chives or parsley. Serve immediately!
Beef Crostini with Horseradish Cream
EQUIPMENT (Amazon Associate Links)
Ingredients
- 1 small sweet onion
- 2 Tbsp butter
- 3 Tbsp mayo
- 3 Tbsp sour cream
- 2 Tbsp creamy horseradish
- 2 Tbsp Dijon mustard
- 1 loaf of baguette bread sliced in to at least 24 pieces I do about 1/2-3/4" thick
- 2 Tbsp olive oil
- 24 small slices of beef can use cooked brisket or sliced cooked roast beef
- Fresh chives or parsley for garnish
Instructions
- For the grilled onions: Melt the butter over medium-high heat in a larger frying pan. Slice the onion in half, then in to thin slices.
- Add the sliced onions to the melted butter, turn heat down to medium, toss and let caramelize slowly, tossing frequently for at least 15-20 minutes until beautifully caramelized. Set aside.
- For the horseradish cream: In a small bowl, combine the mayo, sour cream, creamy horseradish and Dijon mustard. Set aside.
- For the baguette bread: Slice your baguette bread in to 1/2-3/4" thick pieces. Place on a baking sheet, drizzle with olive oil and broil for 2-3 minutes on high or until golden brown.
- To assemble: Place the golden brown bread on a platter. Smear some of the horseradish cream on each slice, place some brisket or a slice of roast beef on each slice. Add a good size pinch of grilled onions to the top, then garnish with some chopped fresh chives or parsley. Serve immediately!
Notes
- Use pre‑cooked brisket for the easiest, most flavorful option. I get mine from Costco!
- Choose creamy horseradish for a balanced, approachable sauce. I use this Inglehoffer brand cream style horseradish which is pretty inexpensive at Walmart.
- Watch the broiler — crostini toast quickly.
- Slice evenly so each piece toasts and holds toppings well.
- Prep ahead by making the onions and sauce earlier in the day. You can reheat the onions in the frying pan before serving.
Beef Crostini FAQ’s:
Can I prep these ahead?
Yes — make the onions and sauce ahead, but assemble just before serving.
What beef works best?
Brisket, roast beef, leftover steak, or deli‑sliced roast beef.
Can I serve them cold?
They’re best warm, but still delicious at room temperature.
How do I keep crostini crisp?
Toast well and assemble right before serving.
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