Preheat your grill to medium heat, approximately 350°F (175°C). Gather ingredients and foil for easy assembly.

Cut a 12-inch square of heavy-duty foil for each salmon fillet. Place each piece skin-side down in the center.

In a small bowl, combine melted butter with chopped basil, lemon juice, salt, and pepper. Stir until blended.

Fold the foil over the salmon, creating a tight seal to keep moisture in. Ensure there are no openings.

Place the sealed foil packets on the grill. Cook for 10 to 15 minutes, checking for doneness around the 10-minute mark.

Once done, remove the foil packets from the grill. Allow to sit for a minute before opening. Serve immediately.