Beef Stir-Fry with Creamy Mushroom Sauce

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Tender flank steak and earthy mushrooms bathed in a rich, dairy-based sauce, ready in 30 minutes for a satisfying weeknight meal. This american-inspired beef (high protein, low carb) ready in about 30 minutes pairs flank steak, avocado oil, cremini mushrooms for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 450 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.

Prep: 15 min Cook: 15 min Serves 2 American cuisine 450 cal/serving
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Ingredients

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Instructions

  1. Step 1: Heat 2 tablespoons avocado oil in a large skillet over medium-high heat until shimmering. Add 12 ounces thinly sliced flank steak in a single layer and cook for 2-3 minutes per side until browned, then transfer to a plate.
  2. Step 2: Add the remaining 1 tablespoon avocado oil to the skillet, then add 1 cup sliced mushrooms, 1/2 cup sliced green onions, and 2 minced garlic cloves. Sauté for 3-4 minutes until mushrooms are tender and onions are translucent.
  3. Step 3: Reduce heat to medium, then add 1/4 cup heavy cream, 2 tablespoons soy sauce, 1 tablespoon lemon juice, and 1/4 teaspoon black pepper. Stir until sauce thickens slightly, about 2 minutes.
  4. Step 4: Return the steak to the skillet and toss to coat in sauce. Cook for 1 more minute until heated through.
  5. Step 5: Remove from heat and stir in 1/4 cup chopped fresh parsley. Serve immediately.

Frequently asked questions

How long does Beef Stir-Fry with Creamy Mushroom Sauce take to make?

Total time is about 30 minutes (15 min prep + 15 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Beef Stir-Fry with Creamy Mushroom Sauce?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep flank steak from drying out.

Can I substitute ingredients in Beef Stir-Fry with Creamy Mushroom Sauce?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Beef Stir-Fry with Creamy Mushroom Sauce for a different number of people?

The recipe is written for 2 servings. Multiply each ingredient by (your serving target / 2). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Beef Stir-Fry with Creamy Mushroom Sauce high protein?

Yes — this recipe is tagged high protein, low carb based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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