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Garlic Butter Steak and Potato Foil Packets

Garlic butter steak and potato foil packets are an easy grilling method that steams tender 1-inch steak cubes with golden baby potatoes. Open a sealed packet at the table to reveal glossy garlic-butter coating and flecks of herbs.
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Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Servings: 4 servings
Course: Main Dish
Cuisine: American
Calories: 690
Ingredients Equipment Method Notes

Ingredients
  

steak and potatoes foil packet mixture
  • 1.5 lb sirloin steak cut into 1-inch cubes
  • 1.5 lb baby potatoes halved
  • 0.5 cup butter melted
  • 6 garlic minced
  • 2 tbsp fresh parsley chopped
  • 1 tsp dried thyme
  • 1 tsp paprika
  • salt and pepper to taste
  • fresh parsley for garnish

Equipment

  • 1 sheet pan

Method
 

Make the garlic butter coating
  1. Combine melted butter, garlic, chopped fresh parsley, dried thyme, paprika, salt, and pepper in a bowl until evenly mixed.
Coat and pack
  1. Toss steak cubes and halved baby potatoes in the garlic butter mixture until well coated, with a glossy herbal coating.
  2. Divide the mixture evenly among 4 large pieces of heavy-duty aluminum foil, then pile it in the center of each sheet.
  3. Fold foil into sealed packets, pressing and crimping all edges tightly so steam stays trapped inside.
Grill and serve
  1. Grill packets over medium-high heat for 20 minutes, then continue grilling up to 25 minutes total until the potatoes are tender.
  2. Flip the packets halfway through grilling so they steam evenly on both sides.
  3. Carefully open packets, watching for steam, and garnish with fresh parsley.
  4. Serve immediately with the tender steak bites and golden potatoes coated in garlic butter.

Notes

For best results, keep the foil crimps tight so steam cooks the potatoes and steak evenly. Refrigerate leftovers in a sealed container up to 3 days; reheat gently until warmed through. Freezing is not recommended because potatoes can soften too much after thawing. For a lighter option, use 1/3 less butter (or a plant-based butter) while keeping the garlic and seasonings the same.