June 30, 2026 · 5 min

Seared Bavette Steak with Roasted Garlic Pan Sauce, Mashed Potatoes, and Brussels Sprouts

Dinner5 min720 cal / serving

If you’re looking to impress with a steak dinner that feels truly special, this bavette steak with roasted garlic pan sauce is the answer. Bavette, also known as sirloin flap, is a flavorful cut that benefits from a quick sear and a luscious sauce made from the pan drippings. Here, roasted garlic and beef demi-glace combine to create a deeply savory condiment that elevates every bite.

Alongside the steak, we’re serving creamy mashed potatoes flecked with fresh chives and crisp roasted Brussels sprouts. It’s a complete, satisfying meal that brings restaurant-quality flavors to your home kitchen without complicated techniques.

Ingredients

Sour Cream1.5 tablespoon Sour CreamView ingredient guide
Bavette Steak10 ounce Bavette SteakView ingredient guide
Brussels Sprouts8 ounce Brussels SproutsView ingredient guide
Beef Demi-Glace1 unit Beef Demi-GlaceView ingredient guide
Garlic1 clove GarlicView ingredient guide
Chives0.25 ounce ChivesView ingredient guide
Fingerling Potatoes12 ounce Fingerling PotatoesView ingredient guide
Black Pepperteaspoon (tsp) Black PepperView ingredient guide
Butter2 tablespoon (tbsp) ButterView ingredient guide
Cooking Oil1 teaspoon (tsp) Cooking OilView ingredient guide
Saltteaspoon (tsp) SaltView ingredient guide

Instructions

  1. Preheat oven to 425°F. Halve Brussels sprouts. Cut fingerling potatoes into 1-inch pieces. Mince garlic. Finely chop chives.
  2. On a baking sheet, toss Brussels sprouts and potatoes with olive oil, salt, and pepper. Roast for 20-25 minutes, until tender and golden.
  3. Meanwhile, pat bavette steak dry and season generously with salt and pepper. Heat a cast-iron or heavy skillet over high heat with cooking oil. Sear steak for 3-4 minutes per side for medium-rare. Transfer to a plate and tent with foil.
  4. Reduce heat to medium. Add minced garlic to the skillet and cook for 30 seconds until fragrant. Add beef demi-glace and ¼ cup water, scraping up browned bits. Simmer for 2 minutes, then stir in 1 tbsp butter until melted. Remove from heat.
  5. In a small bowl, mash the roasted potatoes with sour cream, remaining 1 tbsp butter, and chives. Season with salt and pepper.
  6. Slice steak against the grain. Serve with mashed potatoes, roasted Brussels sprouts, and drizzle with pan sauce.

Useful Cookware

A few helpful kitchen tools for this recipe, with relevant Amazon picks for each item.

Recipe Tips

Let the steak rest after searing to keep it juicy.

For extra flavor, add a splash of red wine to the pan sauce before the demi-glace.

Don’t overcrowd the baking sheet; give Brussels sprouts and potatoes space to roast evenly.

FAQ

Can I use a different cut of steak?

Yes, flank steak or sirloin steak work well as substitutes. Adjust cooking time based on thickness.

How do I know when the steak is done?

Use an instant-read thermometer: 130-135°F for medium-rare, 140-145°F for medium. Let rest before slicing.

Can I make this dairy-free?

Substitute butter with vegan butter or oil, and use dairy-free sour cream. The demi-glace may contain dairy, so check the label.

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