Description

This Spicy Garlic Butter Steak and Potato Foil Packets recipe combines tender, flavorful sirloin steak with perfectly cooked red potatoes, all enveloped in a rich garlic butter sauce infused with jalapenos, fresh parsley, and rosemary. Easy to prepare and cook either in the oven or on the grill, these foil packets make for a delicious, no-mess meal that’s perfect for weeknights or outdoor gatherings.

Ingredients

Scale

Steak and Potatoes

2 pounds sirloin steak (or ribeye, strip, tri-tip, or filet), cubed into bite-size pieces
2 pounds red potatoes, cubed into bite-size pieces
1/4 cup minced jalapeno (about 2 jalapenos)
4 sprigs rosemary (about 2 inches in length each)

Garlic Butter Sauce

6 tablespoons softened salted butter
2 tablespoons minced fresh parsley
2 teaspoons salt
2 teaspoons black pepper
2 teaspoons granulated garlic
1 tablespoon Worcestershire sauce

Instructions

Preheat the Oven or Grill: Preheat your oven to 375 degrees Fahrenheit or, if using an outdoor grill, preheat it to medium-high heat (about 400°F). Meanwhile, bring a medium-sized pot or saucepan of water to a boil.
Prepare the Steak: Cube 2 pounds of sirloin steak into bite-size pieces. Trim off any excess fat or sinew as desired, then set aside.
Parcooking the Potatoes: Cube 2 pounds of red potatoes into bite-size pieces. Parcook them by boiling in the prepared pot for 5 minutes or placing in a microwave-safe dish with 3 tablespoons of water and microwaving for about 3 minutes. The potatoes should still be slightly firm but starting to become tender.
Assemble the Foil Packets: Lay out four pieces of aluminum foil, each about 14×18 inches in size. Distribute 1/2 pound of the cubed steak and 1/2 pound of the parcooked potatoes evenly onto each piece of foil. Sprinkle about 1 tablespoon of the minced jalapenos over each portion, adjusting to taste depending on your preferred spice level.
Make the Garlic Butter Sauce: In a small mixing bowl, mash together the softened salted butter, minced fresh parsley, salt, black pepper, granulated garlic, and Worcestershire sauce using a fork until well combined.
Add Sauce and Rosemary: Spoon the prepared garlic butter sauce evenly over the steak and potatoes on each foil packet. Top each packet with one sprig of rosemary.
Seal the Foil Packets: Fold the foil over the contents and wrap each packet tightly to seal, ensuring no juices leak out during cooking.
Cook the Packets: Place the foil packets directly on the oven rack and bake for 25 to 30 minutes, or place them on the grill grates and cook for 15 to 20 minutes. For well-done steak, add an extra 5 to 7 minutes of cooking time.

Notes

If you prefer a milder heat, reduce the amount of jalapeno or remove the seeds before chopping.
Try swapping sirloin steak with ribeye or strip steak for a different texture and flavor.
Ensure the potatoes are only partially cooked before assembling, so they finish cooking perfectly in the foil packets without becoming mushy.
These foil packets can be prepared ahead of time and refrigerated until ready to cook.
Use heavy-duty aluminum foil for better durability on the grill and to prevent leaks.

Prep Time: 20 minutes
Cook Time: 30 minutes
Category: Main Course
Method: Baking
Cuisine: American

Keywords: steak, garlic butter, potatoes, foil packets, spicy, jalapeno, easy dinner, grilled steak, skillet alternative