These Garlic Butter Steak & Potato Foil Packets are a hearty, flavorful dinner made with juicy seasoned steak, tender baby potatoes, and sweet caramelized onions. Everything cooks together in a foil packet, allowing the garlic butter, herbs, and natural juices to coat every bite.
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The steak develops beautifully browned edges while the potatoes become tender and golden, creating an easy comfort-food meal with minimal cleanup. It’s perfect for a simple weeknight dinner, grilling, or an easy oven-baked meal.
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Why You’ll Love These Garlic Butter Steak & Potato Foil Packets
- Juicy and flavorful steak: Bite-sized steak pieces are seasoned and cooked until tender with beautifully browned edges.
- Tender baby potatoes: Small potatoes absorb the savory garlic butter and steak juices as they cook.
- Sweet caramelized onions: Sliced onions become soft and golden, adding natural sweetness.
- Easy cleanup: Everything cooks together inside a foil packet.
- Versatile cooking: These packets can be prepared in the oven or on the grill.
- Perfect comfort food: Steak, potatoes, onions, garlic, and herbs make a satisfying complete meal.
Ingredients
For the Steak & Vegetables
- 1½ lb sirloin steak or another tender steak, cut into bite-sized pieces
- 1½ lb baby potatoes, halved
- 1 large yellow onion, sliced
- 3 cloves garlic, minced
- 2 tbsp olive oil
- 3 tbsp unsalted butter, melted
- 1 tsp kosher salt
- ½ tsp freshly ground black pepper
- 1 tsp smoked paprika
- 1 tsp dried thyme
- ½ tsp dried rosemary
- ½ tsp garlic powder
- 2 tbsp fresh parsley, chopped
For Finishing
- 1 tbsp fresh parsley, chopped
- 1 tbsp melted garlic butter, optional
- Freshly cracked black pepper, to taste
Instructions
- Preheat the oven: Preheat the oven to 425°F (220°C). Prepare large sheets of heavy-duty aluminum foil for the packets.
- Prepare the potatoes: Wash the baby potatoes thoroughly and cut them in half. For larger potatoes, cut them into smaller, evenly sized pieces so they cook at the same rate as the steak.
- Season the steak: Place the steak pieces in a large bowl. Add olive oil, salt, black pepper, smoked paprika, thyme, rosemary, and garlic powder. Toss well to coat.
- Prepare the vegetables: Add the potatoes, sliced onion, and minced garlic to the bowl. Pour in the melted butter and gently toss everything until evenly coated.
- Build the foil packets: Divide the steak, potatoes, and onions evenly among the foil sheets. Spread the ingredients into the center of each sheet without overcrowding them.
- Seal the packets: Fold the foil tightly over the ingredients and seal the edges to create secure packets. Leave enough room inside for the hot steam to circulate.
- Bake: Place the packets on a baking sheet and bake for approximately 25–30 minutes, or until the potatoes are tender and the steak reaches your preferred level of doneness.
- Brown the steak: Carefully open the packets because hot steam will escape. For more browned edges, leave the packets open and return them to the oven for 3–5 minutes under the broiler, watching closely.
- Finish with herbs: Remove from the oven and sprinkle the steak and potatoes with fresh chopped parsley. Add a little extra melted garlic butter if desired.
- Serve: Serve the steak and potatoes directly from the opened foil packets while hot, spooning the flavorful juices over the top.
Tips for the Best Garlic Butter Steak & Potato Foil Packets
- Choose tender steak: Sirloin, ribeye, or another tender steak works well for this recipe.
- Cut everything evenly: Similar-sized potato pieces cook more consistently.
- Don’t overcrowd the packets: A little space helps the heat circulate and allows the ingredients to cook evenly.
- Use heavy-duty foil: It helps prevent tearing and keeps the flavorful juices inside.
- Be careful when opening: The packets contain very hot steam.
- Check steak separately: Steak can cook faster than potatoes, so use a thermometer if you want precise doneness.
- Don’t overcook the steak: Remove the packets once the steak reaches your preferred internal temperature.
- Finish with fresh herbs: Parsley adds a fresh contrast to the rich garlic butter and roasted flavors.
Nutrition (Approximate Per Serving)
Servings: 4
Calories: ~610 kcal
Protein: 43g
Carbohydrates: 43g
Fat: 31g
Fiber: 5g
Sodium: ~700mg