Creating Buttery Grilled Potatoes in Foil is simple when you follow these steps:

1. Preheat the Grill: Begin by preheating your grill to a medium-high heat (about 400°F or 200°C).
2. Wash and Cut Potatoes: Thoroughly wash the potatoes under cold water. Peel if desired and cut them into 1-inch cubes or slices for more even cooking.
3. Prepare the Seasoning: In a large bowl, combine melted butter, garlic powder, onion powder, dried parsley, salt, and black pepper. Mix well.
4. Coat the Potatoes: Add the cut potatoes to the bowl and toss them in the butter mixture until fully coated.
5. Wrap in Foil: Take a large sheet of aluminum foil and place the coated potatoes in the center. Fold the foil over the potatoes to create a sealed packet, ensuring no steam escapes.
6. Place on the Grill: Carefully place the foil package on the grill grates.
7. Grill the Potatoes: Close the lid and grill for 15-20 minutes. Shake or flip the packet halfway through for even cooking.
8. Check for Doneness: To test if they are done, carefully open the foil (watch for steam!) and see if the potatoes are tender when pierced with a fork.
9. Serve Directly in Foil: Once cooked, remove the packet from the grill and let it rest for a few minutes before serving. You can serve the potatoes directly in the foil for tasty, rustic presentation.