Pan-Seared Beef Steak with Garlic Butter and Rosemary

By AislePrompt Editorial · Published 2026-04-24 · Updated 2026-04-24

Perfectly caramelized flank steak topped with a fragrant garlic-herb butter, ready in under 20 minutes for a satisfying keto dinner. This American-inspired beef recipe (keto), ready in about 20 minutes, pairs flank steak, avocado oil, unsalted butter for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 550 calories and feeds 2, so it slots cleanly into a low-carb week and pairs well with cauliflower rice or roasted green vegetables. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 1 lb flank steak
• 2 tbsp avocado oil
• 3 tbsp unsalted butter
• 4 cloves, minced garlic
• 1 tbsp, finely chopped rosemary
• 1/2 tsp salt
• 1/4 tsp black pepper

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Instructions

1. Step 1: Pat 1 lb flank steak dry with paper towels and season both sides with 1/2 tsp salt and 1/4 tsp black pepper.
2. Step 2: Heat 2 tbsp avocado oil in a large skillet over medium-high heat until shimmering, about 1 minute.
3. Step 3: Add the steak and cook for 3-4 minutes per side for medium-rare, turning once with tongs until golden brown and cooked to your desired doneness.
4. Step 4: Transfer the steak to a cutting board, cover loosely with foil, and let rest for 5 minutes.
5. Step 5: Add 3 tbsp unsalted butter, 4 minced garlic cloves, and 1 tbsp finely chopped rosemary to the skillet over medium heat, stirring constantly until the garlic is fragrant and butter is golden, about 1 minute.
6. Step 6: Pour the garlic butter mixture over the rested steak and let sit for 1 minute before slicing.