Crispy Baked Potatoes with Onion Soup Mix Seasoning

When we’re young we often take everyday comforts for granted — especially dishes we didn’t have to prepare ourselves. My grandmother made these potatoes for years, and only recently did I make them myself and truly appreciate how good they are. These 3 Ingredient Onion Soup Mix Baked Potatoes are simple, comforting, and perfect as a dependable side dish.

This is an easy baked potato recipe that adds bold onion flavor with almost no fuss. They bake beautifully in the oven year-round and are also excellent wrapped in foil on the grill during summer. Serve as a crowd-pleasing side for a weeknight meal or BBQ; they complement rustic mains like meatloaf or roasted vegetables.

🍒Reader Review

“I’m not sure where I found your recipe, may have been on a Meal Plan Monday, but I sure am glad I did. I made these this past weekend and my husband and I both just loved them. He gave rave reviews. Will be making these a lot from now on!” ⭐⭐⭐⭐⭐

🥘 Ingredient Notes

This version of baked potatoes in foil is a no-fuss, old-school method my grandmother used decades ago. The technique is straightforward and emphasizes flavor without a lot of prep.

Unlike hasselback potatoes, these are not peeled and require only a few shallow cuts, so they’re quicker to prepare while still absorbing the onion-margarine mixture.

Why peel when you don’t need to? Potato skins add texture and nutrients, and fewer cuts means less work.

For these onion soup mix baked potatoes you only need three simple ingredients:

• Potatoes: Any variety will work, though classic baking potatoes are Russets because their high starch and low moisture yield a fluffy interior and crisp skin. Red or Yukon Golds are fine if that’s what you have on hand.
• Onion soup mix: A single packet of dry onion soup mix (about 28 g) provides the savory base. Use store-bought or a homemade blend.
• Margarine: Margarine or butter both work; the recipe uses margarine. Choose your preferred spread, including vegan options if needed.

*See the recipe card below for exact quantities and full details.

📖 Variations

• Baked or Grilled: These potatoes are excellent wrapped in foil and cooked on the grill or roasted in the oven.
• Onion soup mix: Use any brand or a homemade mix if you prefer.
• Potatoes: Use whichever potatoes you have; larger potatoes are easiest to slice and fill. Sweet potatoes can be substituted for a different flavor.
• Margarine vs. butter: Use butter if you prefer, but margarine delivers a slightly different flavor profile that many enjoy.
• Dairy-free/Vegan: Use vegan margarine and confirm your onion soup mix is vegan.
• Lower points: Choose a lighter margarine to reduce WW/Points values.

Many recipes pour a melted onion-and-butter mixture over potatoes, but that can let much of the flavor run off. This method places small dabs of the unmelted margarine-onion mix between the slices before wrapping in foil, which locks the flavor in as the potatoes bake.

Placing the mixture between slices and baking in foil locks in a richer onion-butter taste than simply pouring melted butter on top.

🔪 How to Make Baked Potatoes with Onion Soup Mix

This method is quick, easy, and ensures the potato interior soaks up the savory onion flavor.

Prep: Preheat oven to 400°F (204°C). Scrub potatoes and remove any eyes or blemishes.

1. Step 1: In a small bowl, combine margarine (or butter) with one packet of dry onion soup mix until well mixed.

2. Step 2: Using a sharp knife, make crosswise cuts about 1/2 inch apart, making 4–5 shallow cuts per potato. Stop about 1/4 inch from the bottom — do not slice all the way through.

3. Step 3: Place each potato on a large piece of foil (shiny side inward). Use a butter knife to add small dabs of the margarine-onion mixture between the slices, dividing it evenly among the potatoes.

4. Step 4: Wrap each potato in aluminum foil (shiny side in) and place on a baking sheet to catch any drips. Bake in the oven for 40–50 minutes, or until a fork slides in easily; larger potatoes may take longer. For the grill, cook over medium-high heat with the lid closed for 30–40 minutes. Garnish with sour cream, chopped green onions, bacon bits, or your preferred toppings.

Expert Recipe Tips

• Choose the right potatoes. Russets are best for a light, fluffy interior and crisp skin, though other varieties will still work.
• Slice evenly. Make cuts about 1/2 inch apart and stop 1/4 inch from the bottom for even cooking and flavor distribution.
• Use the shiny side of the foil. Placing the potato on the shiny side facing inward helps reflect heat for even baking.
• Don’t overfill the slices. A small dab in each slice is sufficient; overfilling can cause leaks and uneven cooking.
• Double-wrap for grilling. Double-wrap the foil for grill cooking to prevent burning and to contain any melted margarine.
• Add fresh herbs after baking. Sprinkle chopped parsley, chives, or thyme at the end to brighten the dish.
• Let them rest. Allow potatoes to sit in foil for 5 minutes after baking so the centers finish steaming and the flavors settle.
• Make ahead and reheat. Bake a day ahead and reheat at 350°F for 15–20 minutes if needed for meal prep.
• Line your baking sheet. Even wrapped, potatoes can leak—line the pan with foil or parchment for easy cleanup.

👪 Serving Size

This recipe yields about 6 servings. Scale the recipe up or down as needed; you may need extra baking sheets for larger batches.

🔢WW Points

Using a light margarine keeps WW points lower. Points will vary based on the specific margarine or butter you choose.

🥗 What to Serve with Onion Baked Potatoes

These potatoes pair beautifully with grilled or roasted meats and simple vegetable sides. Try them alongside baked chicken, pork loin steaks, or BBQ beer-can chicken for a classic backyard meal.

🌡️Storage

Store leftovers in an airtight container in the refrigerator for up to 3 days. Keep the foil on or transfer potatoes to a container. If reheating in the microwave, remove foil. These potatoes do not freeze well.

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