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A group of steak crostini arranged on a patterned serving plate, each topped with white horseradish sauce and chopped chives.
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Garlic Butter Steak Crostini with Horseradish Cream

This recipe for steak crostini is an easy, yet impressive appetizer that's always the first to go at parties! Thin slices of steak are layered onto a crisp garlic butter crostini with a creamy horseradish sauce over top and fresh chives to finish. It's so simple, but always everyone's favorite!
Prep Time: 25 minutes
Cook Time: 12 minutes
Total Time: 37 minutes
Servings: 20 up to 20 crostini
Calories: 99kcal

Ingredients

  • 6 tablespoons butter very soft
  • 2 cloves garlic very finely minced
  • 2 teaspoons fresh parsley finely minced
  • salt and pepper as needed
  • 1 French baguette
  • 8-10 ounces steak cooked medium to medium rare, cooled to room temperature, see note*
  • ½ cup sour cream
  • 2 tablespoons prepared horseradish
  • extra virgin olive oil for drizzling
  • 1 tablespoon chives finely chopped

Instructions

  1. Heat the oven to 375°F. Line a sheet pan with parchment.
  2. Mix the butter with garlic, parsley and season with kosher salt and pepper.
    6 tablespoons butter, 2 cloves garlic, 2 teaspoons fresh parsley, salt and pepper
  3. Spread a thin layer on each baguette slice and place them on the pan.
    1 French baguette
  4. Bake until the edges turn lightly golden and the centers stay a bit tender, about 10-12 minutes. Let cool on the pan.
  5. Slice the steak as thin as you can across the grain. Let it sit out until the chill is gone if it was refrigerated so the fat softens and the texture stays tender.
    8-10 ounces steak
  6. Stir the sour cream, horseradish, a pinch of salt and a few grinds of black pepper in a small bowl. Taste and adjust.
    ½ cup sour cream, 2 tablespoons prepared horseradish
  7. Add a few slices of steak to each crostini and a drizzle of olive oil.
    extra virgin olive oil
  8. Spoon a small amount of horseradish sauce over each one and sprinkle with chives. Serve right away.
    1 tablespoon chives

Notes

  • If cooking the steak fresh, let it cool completely before slicing so it stays juicy. You can also use leftover steak or cook the steak 1 day in advance and refrigerate until needed. 
  • Pat the steak dry with paper towels before searing to help achieve an even sear over medium-high heat.
  • Bake the crostini up to a day ahead and store in an airtight container. Warm briefly in a low oven to re-crisp before assembling.
  • The horseradish cream can be mixed up to 3 days ahead. Its flavor actually strengthens as it sits.
  • Prep all of the elements in advance and assemble just before serving so all the different components stay fresh.

Nutrition

Calories: 99kcal | Carbohydrates: 7g | Protein: 4g | Fat: 6g | Saturated Fat: 4g | Polyunsaturated Fat: 0.4g | Monounsaturated Fat: 2g | Trans Fat: 0.1g | Cholesterol: 19mg | Sodium: 118mg | Potassium: 59mg | Fiber: 0.3g | Sugar: 1g | Vitamin A: 150IU | Vitamin C: 1mg | Calcium: 22mg | Iron: 1mg
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