Crispy Pan-Seared Beef with Caramelized Mushrooms

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · Published 2026-04-23 · Updated 2026-04-23

Tender beef strips seared to perfection with earthy mushrooms and a lemon-herb glaze, perfect for a quick keto dinner. This american-inspired beef (low-carb) ready in about 25 minutes pairs beef sirloin, mushrooms, olive oil for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 270 calories and feeds 2, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. 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

• 8 oz beef sirloin
• 4 oz mushrooms
• 1 tbsp olive oil
• 2 cloves garlic
• 1/2 tsp dried thyme
• 1/4 tsp salt
• 1/4 tsp black pepper
• 1 tbsp unsalted butter
• 1 tbsp lemon juice

Instructions

1. Step 1: Heat 1 tbsp olive oil in a large skillet over medium-high heat until shimmering (about 2 minutes).
2. Step 2: Add 8 oz beef strips and cook for 3-4 minutes per side until browned, then transfer to a plate and set aside.
3. Step 3: Add 4 oz sliced mushrooms to the skillet and cook for 5 minutes until they release liquid and turn golden brown.
4. Step 4: Stir in 2 minced garlic cloves and cook for 1 minute until fragrant, then add 1/2 tsp dried thyme, 1/4 tsp salt, and 1/4 tsp black pepper.
5. Step 5: Return beef to skillet, add 1 tbsp unsalted butter and 1 tbsp lemon juice, and toss until butter melts and sauce coats the beef (about 1 minute).