🥔 Herb-Infused Potatoes Au Gratin Foil Packets with Leeks
Servings: 4
Prep Time: 15 minutes | Cook Time: 30–35 minutes
These foil packets were a huge hit at home! Perfectly portioned for four, they deliver rich, creamy flavor with minimal cleanup—ideal for both weeknight dinners and outdoor grilling.
This version of Potatoes Au Gratin, infused with aromatic thyme and tender leeks, gives a deliciously rustic nod to traditional Midwestern comfort food. Wrapped and grilled in foil, the dish gains a beautiful earthiness while retaining the elegance of a classic gratin. Whether you’re cooking over open flames or a gas grill, these packets offer a modern spin on an old favorite.
🧄 Ingredients
4 medium potatoes, thinly sliced (Yukon Gold or Russets work best)
1 cup heavy cream
1 cup leeks, chopped (white and light green parts only)
2 cloves garlic, minced
1 teaspoon salt
½ teaspoon black pepper
1 teaspoon fresh thyme leaves (or ½ tsp dried)
1 cup grated Gruyère cheese (or your favorite melty cheese)
4 sheets heavy-duty aluminum foil (about 12×12 inches each)
🔥 Instructions
Preheat the Grill:
Set your grill to low, indirect heat (about 300–325°F).
Make the Cream Sauce:
In a small saucepan, combine heavy cream, leeks, garlic, salt, pepper, and thyme.
Heat over medium until steaming, then reduce to low and let simmer 3–5 minutes to infuse the flavors. Remove from heat.
Assemble the Packets:
Divide the thinly sliced potatoes evenly among the foil sheets, layering them slightly overlapping.
Add the Sauce:
Carefully spoon the warm cream mixture over each pile of potatoes, making sure every packet gets leeks and plenty of sauce.
Seal and Grill:
Fold the foil over the potatoes and crimp the edges to seal tightly.
Place on the grill and cook for 25–30 minutes, rotating once halfway through, until potatoes are fork-tender.
Add the Cheese:
Open the packets (watch out for steam!), sprinkle Gruyère on top, and return to the grill for 5–7 minutes, uncovered, until the cheese is melted and bubbling.
Serve Hot:
Serve the packets directly from the foil or transfer to plates. Garnish with extra thyme or chives, if desired.
🧑🍳 Tips & Variations
Cheese Swaps: Substitute Gruyère with sharp cheddar, Fontina, Swiss, or smoked Gouda for different flavor profiles.
Spice It Up: Add a pinch of nutmeg to the cream sauce for depth or a dash of cayenne for heat.
Vegetarian Boost: Toss in sliced mushrooms, bell peppers, or zucchini for added texture and nutrition.
No Grill? Bake foil packets on a baking sheet in a preheated oven at 375°F for about 35–40 minutes.
🥗 What to Serve With
These foil packet potatoes pair beautifully with:
A crisp green salad with lemon vinaigrette
Grilled meats like chicken, steak, or pork chops
Roasted vegetables or corn on the cob for a summery, satisfying meal
👨👩👧👦 Why You’ll Love It
✅ No dishes to wash
✅ Make-ahead friendly
✅ Crowd-pleasing comfort food with gourmet flair
✅ Perfect for grilling season or cozy nights in
Enjoy!