Ingredients
Equipment
Method
Make the patties
- Form the ground beef into 4 thin patties and season with salt and pepper. Keep the patties thin so they finish cooking inside the foil packets.
Assemble foil packets
- On each sheet of heavy-duty aluminum foil, layer the sliced potatoes and onions. Spread them in an even layer so steam cooks the potatoes through.
- Place a burger patty on top of the potato-onion layer, then add the sliced tomato over the patty. The tomato should sit near the center so it steams the meat.
- Drizzle ketchup and mustard over the packet filling. Use enough to coat the top lightly without soaking through the foil.
- Fold the foil into sealed packets and place them on a campfire grate over medium heat. Seal tightly to keep steam inside; you should see no gaps at the edges.
Cook and melt cheese
- Cook packets for 25-30 minutes over medium heat, flipping them halfway through. Look for the potatoes to be tender when you open one briefly.
- Open each packet and add 1 slice of cheddar cheese on top, then reseal briefly to melt. Stop when the cheese is fully melted and slightly stretchy.
- Let the packets cool for 5 minutes before serving. The filling should thicken slightly as it rests, making it easier to eat.
Serve
- Serve the cheeseburger packets in the foil, or on hamburger buns if desired. Use the opened foil as a guide for a hot, mess-free portion.
Notes
Pro tip: slice the potatoes very thin so they steam-cook within the 25–30 minutes without turning hard. Store leftovers in an airtight container in the fridge for up to 3 days; reheat in the microwave or in a covered skillet until hot. Freezing is not recommended because potatoes can soften too much after thawing. For a lighter take, use lean ground beef (90% or higher) while keeping the same cooking method.
