These Mushroom and Swiss Burger Foil Packets are a fantastic way to enjoy a juicy burger with melty Swiss cheese and savory mushrooms all cooked together in a neat little package. The mushrooms add a great earthy flavor that pairs perfectly with the gooey cheese, and wrapping everything in foil helps lock in all the delicious juices and aromas.
I love making these foil packets when we’re grilling outside because they’re super easy to throw on the grill and clean up after. Plus, the packets keep the burgers nice and moist while letting the mushrooms soften up just right. It’s one of those meals that feels special but takes very little effort, which is always a win in my book.
My favorite way to enjoy these burgers is right out of the foil, with a soft bun and some fresh toppings like lettuce and tomato. It’s also fun to serve them with a simple side of crispy fries or a fresh salad. These foil packets really bring the flavors together and make for a cozy, satisfying meal that everyone seems to love!
Key Ingredients & Substitutions
Ground Beef: Using 80/20 ground beef is great because the fat keeps the burger juicy and flavorful. If you prefer leaner options, 90/10 works but cook a bit less to avoid drying out.
Mushrooms: Cremini mushrooms have a deeper flavor than white button mushrooms, but either works fine. You can also try baby bella or portobello for a meatier texture.
Swiss Cheese: Swiss melts wonderfully and adds a mild nuttiness. If you don’t have Swiss, provolone or mozzarella are good milder options that melt well.
Bacon (optional): Crispy bacon adds extra crunch and smoky flavor, but you can skip it for a simpler burger or use turkey bacon for a lighter choice.
How Do You Keep the Burgers Juicy and the Mushrooms Tender in Foil Packs?
Wrapping burgers in foil keeps moisture trapped inside, so the beef stays juicy and the mushrooms soften nicely without drying out. Here’s how to do it right:
- Shape patties evenly so they cook uniformly.
- Sauté mushrooms before adding them – this locks in flavor and prevents sogginess.
- Seal the foil packets tightly but leave a little space inside for the steam to circulate.
- Cook on medium heat and flip packets halfway through for even cooking.
- Let burgers rest in the foil a minute after cooking to allow juices to redistribute.
Equipment You’ll Need
- Grill or oven – I prefer grilling for a smoky flavor, but the oven works just as well indoors.
- Aluminum foil – makes wrapping and easy cleanup simple.
- Skillet – used to sauté the mushrooms, which adds great flavor and texture.
- Tongs or spatula – for flipping foil packets and handling hot items.
- Meat thermometer – helps ensure your burger reaches a safe 160°F without overcooking.
Flavor Variations & Add-Ins
- Swap Swiss cheese for provolone or cheddar for different cheesy flavors.
- Top with caramelized onions or sautéed peppers for extra sweetness or crunch.
- Add a slice of cooked bacon or turkey bacon for smoky richness.
- Mix in your favorite herbs, like thyme or rosemary, into the ground beef for more aroma.
Mushroom and Swiss Burger Foil Packets
Ingredients You’ll Need:
For the Burgers:
- 1 lb ground beef (80/20 blend for juiciness)
- Salt and freshly ground black pepper, to taste
- Optional: garlic powder, onion powder, or Worcestershire sauce for seasoning
For the Mushrooms:
- 8 oz mushrooms, sliced (cremini or white button)
- 1 tbsp olive oil or butter
- Salt and freshly ground black pepper, to taste
For Assembling:
- 4 slices Swiss cheese
- 4 hamburger buns
- Optional: cooked bacon slices for topping
- Aluminum foil, enough to make packets
How Much Time Will You Need?
This recipe takes about 15 minutes to prepare and about 15-20 minutes to cook. If you want to toast your buns, add an extra few minutes at the end. Overall, it’s a quick meal perfect for grilling or oven cooking!
Step-by-Step Instructions:
1. Prepare the Grill or Oven:
Preheat your grill to medium-high heat, around 375-400°F. If you’re cooking indoors, preheat your oven to 400°F.
2. Make the Burger Patties:
Divide the ground beef into 4 equal portions. Shape each portion into a patty about ¾ inch thick. Season both sides with salt, pepper, and any optional seasonings like garlic or onion powder.
3. Cook the Mushrooms:
Heat olive oil or butter in a skillet over medium heat. Add the sliced mushrooms and cook them until soft and golden brown, about 5-7 minutes. Season with a little salt and pepper.
4. Assemble Foil Packets:
Cut 4 pieces of aluminum foil, large enough to wrap each burger. Place one patty in the center of each foil piece. Add a generous topping of sautéed mushrooms over each patty, then place a slice of Swiss cheese on top. For added flavor, add cooked bacon slices if you like.
5. Wrap and Cook:
Seal the foil packets tightly to trap steam inside. Place the packets on the grill or in the oven. Cook for 15-20 minutes, flipping them halfway through so they cook evenly. Use a meat thermometer to check for an internal temperature of 160°F to ensure they’re fully cooked.
6. Optional Bun Toasting:
Open the foil carefully during the last minute to toast your hamburger buns on the grill or in the oven for a warm, lightly crisped finish.
7. Serve and Enjoy:
Remove the foil packets from heat and let them sit for a minute before opening to avoid steam burns. Place each burger on a bun, add your favorite toppings like lettuce or tomato, and serve immediately.
Enjoy your delicious Mushroom and Swiss Burger Foil Packets—juicy, cheesy, and full of flavor!
Can I Use Frozen Ground Beef for These Burgers?
Yes, but make sure to fully thaw the ground beef in the refrigerator before shaping the patties. This ensures even cooking and better texture.
How Do I Store Leftover Mushroom and Swiss Burger Foil Packets?
Store any leftovers in an airtight container in the fridge for up to 2 days. Reheat gently in the oven or microwave before serving to keep them juicy.
Can I Make These Foil Packets Ahead of Time?
Absolutely! Prepare the foil packets up to step 7, then refrigerate them until you’re ready to cook. Add a few extra minutes to the cooking time if cooking straight from the fridge.
What Are Good Side Dishes to Serve With These Burgers?
Try serving these burgers with crispy fries, a fresh garden salad, or grilled vegetables for a complete and balanced meal.