Oven-Baked 5-Ingredient Beef & Onion Foil Packet Dinner
This simple and cozy beef and onion foil packet dinner is the ultimate no-fuss meal. With just 5 ingredients, minimal cleanup, and bold flavor, it’s perfect for busy weeknights or meal prep.
- Prep Time: 15 minutes
- Cook Time: 30–35 minutes
- Total Time: 45–50 minutes
- Yield: 4 servings
- Category: Dinner, One-Pan Meal
- Method: Oven-Baked, Foil Packets
- Cuisine: American, Midwest-Inspired
Ingredients
1½ pounds thinly sliced beef steak (sirloin or round)
2 large yellow onions, thinly sliced
1½ pounds baby potatoes, halved (or cut into 1-inch chunks)
3 tablespoons olive oil
2 teaspoons steak seasoning (or your favorite all-purpose blend)
Salt and black pepper, to taste (optional)
Nonstick cooking spray (optional, for foil)
Instructions
Preheat oven to 400°F (200°C). Line a large baking sheet with foil. Tear 4 sheets of heavy-duty foil (12×18 inches) and spray with cooking spray if desired.
Slice onions and halve potatoes. Pat beef dry and slice into strips if not pre-cut.
In a large bowl, toss potatoes and onions with olive oil, steak seasoning, and salt/pepper (if needed).
Divide mixture evenly among foil sheets. Top each with a portion of sliced beef.
Seal packets: fold long sides of foil together over the filling, then roll up the ends. Leave some space inside for air circulation.
Place packets on the baking sheet. Bake for 30–35 minutes, or until potatoes are fork-tender and beef is cooked through.
For less-done beef, open packets for the last 5 minutes to release steam.
Let rest 3–5 minutes before serving. Carefully open (watch for steam) and serve directly in the foil or transfer to plates. Spoon juices over top.
Notes
Optional add-ins: bell peppers, carrots, green beans (keep total volume the same).
Use melted butter instead of olive oil for richer flavor.
Try taco or Italian seasoning for variety—top with salsa, cheese, or Parmesan after baking.
Sweet potatoes can replace baby potatoes (cut small for even cooking).
Prep-ahead: Assemble packets the night before and refrigerate. Add 5–7 minutes to bake time if starting cold.
Cooking for 2? Halve the recipe and make 2 larger packets instead.
