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Garlic Butter Steak & Potato Foil Packets

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Garlic Butter Steak & Potato Foil Packets

Tender, juicy bite-sized steak paired with crisp-edged baby potatoes, smothered in a rich herb and garlic compound butter. Garlic Butter Steak and Potato Foil Packets offer steakhouse-quality flavor with virtually zero cleanup. Whether roasted in the oven on a weeknight or tossed onto a campfire grate during a weekend getaway, the sealed aluminum foil locks in moisture, steam-cooking the potatoes to creamy perfection while allowing the steak to soak in rich savory juices.

Recipe Overview & Cooking Specs

Attribute Details
Prep Time 20 minutes
Cook Time 25 minutes
Total Time 45 minutes
Servings 4 individual packets
Recipe Intensity / Skill Level Easy (Beginner-friendly)
Primary Technique Steam-Baking / En Papillote (in foil)
Heat Intensity (Oven) 425°F (220°C) high heat
Heat Intensity (Grill) Medium-High (400°F–450°F) direct heat

Ingredients List

The Meat & Potatoes

  • 1.5 lbs (680g) Sirloin Steak or Ribeye: Cut into uniform 1-inch bite-sized cubes. (Ribeye provides maximum tenderness and marbling; Top Sirloin offers a lean, beefy chew).

  • 1.5 lbs (680g) Baby Red Potatoes or Baby Yukon Golds: Quartered into bite-sized pieces (approx. 1/2-inch thick to ensure quick, even cooking alongside the beef).

  • 1 tbsp Olive Oil: Used to toss the potatoes prior to par-cooking.

Garlic Herb Butter Sauce

  • 6 tbsp Unsalted Butter: Softened to room temperature.

  • 5 cloves Garlic: Minced fine.

  • 1 tbsp Fresh Parsley: Chopped fine.

  • 1 tsp Fresh Thyme Leaves: Chopped fine (or 1/2 tsp dried thyme).

  • 1 tsp Fresh Rosemary: Chopped fine (optional, for earthy aroma).

Seasoning Blend

  • 1 tsp Kosher Salt (divided)

  • 1/2 tsp Coarsely Ground Black Pepper

  • 1/2 tsp Onion Powder

  • 1/2 tsp Smoked Paprika

  • 1/4 tsp Red Pepper Flakes (optional, for subtle heat)

Preparation & Execution Steps

Par-boiling or pre-microwaving the potatoes for 3–4 minutes is the essential secret to perfect foil packets. Potatoes require a longer cooking time than tender steak cubes; par-cooking guarantees that both ingredients reach ideal doneness simultaneously without overcooking the meat into rubber.

1.Par-Cook the Potatoes:Crucial for even cooking times.

Place the quartered baby potatoes into a microwave-safe bowl with 1 tablespoon of water. Cover tightly with a plate or paper towel and microwave on HIGH for 3 to 4 minutes until slightly tender when pierced with a fork, but not fully soft. Drain any remaining water and let cool for 2 minutes. Alternatively, boil in salted water for 5 minutes and drain well.

2.Mix the Herb Butter & Prepare Steak:Maximizing savory flavor distribution.

In a small bowl, mash together the softened unsalted butter, minced garlic, fresh parsley, thyme, rosemary, 1/2 teaspoon kosher salt, and black pepper until fully combined. Pat the cubed steak completely dry with paper towels. Toss the dry steak cubes in a medium bowl with smoked paprika, onion powder, red pepper flakes, and the remaining 1/2 teaspoon kosher salt.

3.Assemble the Foil Packets:Use heavy-duty aluminum foil to prevent leaks.

Cut four large sheets of heavy-duty aluminum foil (approx. 12×18 inches each). Divide the par-cooked potatoes evenly into the center of each sheet. Arrange the seasoned steak cubes alongside and over the potatoes in a single layer. Top each portion generously with 1.5 tablespoons of the prepared compound garlic butter.

4.Seal and Crimp Tight:Locks in steam and prevents butter loss.

Bring the two long edges of the foil sheet together over the food. Fold them down together twice to create a tight seal. Next, double-fold both short ends inward, pressing firmly to seal the packet completely. Leave a tiny bit of headspace inside each packet for steam to circulate freely.

5.Cook in Oven or on the Grill:High heat for fast, moist cooking.

  • Oven Method: Preheat oven to 425°F (220°C). Place foil packets on a large rimmed baking sheet. Bake for 15 to 18 minutes for medium doneness on the steak (internal temperature of 145°F / 63°C).

  • Grill Method: Preheat grill to Medium-High (approx. 425°F). Place foil packets directly onto the grill grates over direct heat. Cover grill lid and cook for 12 to 15 minutes, flipping once midway through.

6.Rest, Open, and Serve:Beware of hot steam upon opening.

Remove packets from heat and let them rest unopened for 3 minutes. Carefully cut open the top seams using scissors or a fork, taking extreme caution as trapped hot steam will escape immediately. Garnish with fresh chopped parsley and extra sea salt to taste. Serve warm straight from the foil or plated.

Pro-Tips for Perfect Results

  1. Pat Steak Dry: Surface moisture prevents searing and leads to boiling. A quick wipe with paper towels ensures a rich brown color.

  2. Heavy-Duty Foil is Mandatory: Standard aluminum foil tears easily when turned or handled with tongs, letting aromatic butter leak onto the oven tray or grill flame.

  3. Internal Temperature Guide:

    • Medium-Rare: Pull packets at 135°F (approx. 12–14 mins in oven).

    • Medium: Pull packets at 145°F (approx. 15–17 mins in oven).

    • Well-Done: Pull packets at 160°F+ (approx. 20 mins in oven).

Storage, Reheating & Meal Prep

  • Refrigeration: Store leftover cooked contents (transferred out of foil into airtight glass containers) in the refrigerator for up to 3–4 days.

  • Reheating: Reheat in a skillet over medium heat with a splash of water or beef broth for 3–5 minutes until warm, or bake at 350°F (175°C) loosely wrapped in fresh foil for 10 minutes. Avoid heavy microwaving, which can toughen the beef.

Complete Nutritional Information

Values are calculated per single foil packet serving (1 packet out of 4).

Macro Breakdown

Nutrient Amount per Serving % Daily Value (DV)
Calories 520 kcal —
Total Fat 28 g 36%
Saturated Fat 13 g 65%
Trans Fat 0.8 g —
Cholesterol 115 mg 38%
Sodium 680 mg 30%
Total Carbohydrates 29 g 11%
Dietary Fiber 3.5 g 12%
Total Sugars 2 g —
Protein 38 g 76%

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