This Oven-Baked Beef Steak and Onion Foil Bake is a simple, hearty dinner made with just four basic ingredients. The steak cooks gently inside sealed foil packets, allowing the onions to become tender and sweet while keeping the meat juicy and flavorful. With minimal prep and almost no cleanup, this comforting meal is perfect for busy weeknights, family dinners, or meal prep. Serve it with mashed potatoes, rice, or your favorite vegetables for a complete meal.
Ingredients
For the Steak Packets
- 1½–2 lbs (680–900g) beef steak (sirloin, round, or chuck), about 1-inch thick
- 2 large onions, thinly sliced
- 3 tbsp olive oil or melted butter
- 1½ tsp salt
- 1 tsp black pepper
Step-by-Step Instructions
Step 1: Preheat the Oven
- Preheat your oven to 400°F (200°C).
- Prepare 4 large sheets of heavy-duty aluminum foil.
Step 2: Season the Onions
- Place the sliced onions in a bowl.
- Drizzle with olive oil or melted butter.
- Sprinkle with half of the salt and pepper.
- Toss until evenly coated.
Step 3: Prepare the Steak
- Cut the steak into 4 equal portions.
- Pat dry with paper towels.
- Season both sides with the remaining salt and pepper.
Step 4: Assemble the Packets
- Lay the foil sheets flat on the counter.
- Divide the seasoned onions evenly among the foil sheets.
- Place each steak portion on top of the onions.
- Spoon any remaining oil and seasonings over the steaks.
Step 5: Seal the Packets
- Fold the foil tightly around the steak and onions.
- Roll and crimp the edges to create sealed packets.
- Ensure no steam can escape.
Step 6: Bake
- Arrange the foil packets on a baking sheet.
- Bake for 20–25 minutes for medium doneness.
- Add 5–10 extra minutes if you prefer well-done steak or are using a tougher cut.
Step 7: Rest and Serve
- Remove from the oven and let rest for 5 minutes.
- Carefully open the packets (watch for hot steam).
- Spoon the onions and flavorful juices over the steak.
- Serve immediately.
Tips
- Use butter instead of olive oil for a richer flavor.
- Add thinly sliced potatoes underneath the onions for a complete meal.
- For a slightly crispy finish, open the packets and broil for 2–3 minutes before serving.
- Leftovers make excellent steak sandwiches or wraps.
Q&A
Q: Can I use a different cut of beef?
A: Yes, sirloin, chuck, round steak, or even ribeye work well.
Q: How do I store leftovers?
A: Refrigerate in an airtight container for up to 3 days.
Q: Can I make this ahead of time?
A: Yes. Assemble the foil packets and refrigerate them for up to 24 hours before baking.
Servings & Nutrition
Servings: 4
Approximate Nutrition Per Serving
- Calories: 420
- Protein: 38g
- Carbohydrates: 7g
- Fat: 27g
- Fiber: 1g