Slow Cooker 3-Ingredient Onion Butter Potatoes

How to Make Slow Cooker Onion Butter Potatoes

Step 1: Prepare the Potatoes

Rinse the red potatoes under cool water and scrub away any dirt.

Pat them dry, then cut each potato into quarters. Try to keep the pieces approximately the same size so they finish cooking at roughly the same time.

Step 2: Prepare the Slow Cooker

Lightly grease the inside of your slow cooker with a little butter or nonstick cooking spray.

This isn't absolutely necessary, but it can make cleanup easier.

Place the quartered potatoes into the slow cooker.

Step 3: Make the Onion Butter

Melt the butter in a small bowl or measuring cup.

Add both packets of dry onion soup mix and stir until the seasoning is evenly distributed throughout the melted butter.

The mixture will be fragrant and thick with visible onion pieces.

Step 4: Coat the Potatoes

Pour the onion-butter mixture over the potatoes.

Gently toss everything together with a large spoon, making sure as many potato pieces as possible are coated.

You want that buttery onion mixture clinging to the potatoes before the cooking begins.

Step 5: Slow Cook

Cover the slow cooker with the lid.

Cook on:

• LOW: 4–5 hours
• HIGH: 2–3 hours

The potatoes are ready when they're fork-tender.

Cooking times can vary between slow cookers, so use tenderness as your best guide.

Step 6: Stir and Serve

During the final hour, you can gently stir the potatoes once or twice to redistribute the butter and seasoning.

When the potatoes are tender, turn off the slow cooker and give everything one final gentle stir.

Transfer the potatoes to a serving bowl and spoon some of the flavorful onion-butter coating over the top.

Serve hot!

What to Serve With Onion Butter Potatoes

These potatoes can accompany almost any classic main dish.

For a Cozy Family Dinner

Serve them alongside:

• Meatloaf
• Roast beef
• Baked ham
• Grilled chicken
• Roasted chicken
• Smoked sausage

Add Something Fresh

Because the potatoes are rich and buttery, a fresh vegetable makes a lovely companion.

Try:

• Steamed green beans
• Buttered peas
• Simple green salad
• Roasted broccoli
• Fresh garden salad
• Crisp coleslaw

Turn Leftovers Into Breakfast

Don't overlook those leftovers!

Crisp the potatoes in a skillet with a little butter until the edges become golden and crunchy. Serve them alongside eggs and breakfast sausage for a hearty morning meal.

Tips for the Best Slow Cooker Potatoes

Cut the Potatoes Evenly

Uniform pieces cook more consistently. If some pieces are tiny and others are very large, the smaller ones may become overly soft before the larger pieces are done.

Leave the Skins On

Red potato skins are thin and tender, so peeling isn't necessary. They also add beautiful color to the finished dish.

Don't Add Extra Salt Too Soon

The onion soup mix is already salty and seasoned. Taste the finished potatoes before deciding whether they need additional salt.

Don't Over-Stir

Potatoes can become fragile as they soften. Gentle stirring is all you need.

Watch Hot Slow Cookers

If your slow cooker tends to cook aggressively, the edges may brown faster. Stir gently when needed and use the LOW setting for a slower, more even cook.

How to Make These Potatoes for a Crowd

Need more potatoes?

You can increase the amount of potatoes while keeping the basic method the same. For an additional pound of potatoes, add roughly another half packet of onion soup mix and a tablespoon or two of melted butter.

Make sure your slow cooker isn't overcrowded, though. The potatoes need enough room to cook evenly.

Storage Instructions

Allow leftover potatoes to cool, then place them in an airtight container and refrigerate.

They should be enjoyed within 3–4 days.

For the best reheating texture, warm them in a skillet with a small amount of butter. This helps the edges become golden and crisp again.

You can also reheat individual portions in the microwave when you're in a hurry, although the skillet gives you a much nicer texture.

Can You Freeze Onion Butter Potatoes?

You can freeze cooked potatoes, but their texture may change after thawing. Potatoes can sometimes become softer or slightly grainier after freezing.

For the best results, I recommend enjoying these fresh or using refrigerated leftovers within a few days.

Frequently Asked Questions

Can I use Yukon Gold potatoes?

Yes! Yukon Gold potatoes work beautifully and give the finished dish a slightly creamier texture.

Do I need to peel the potatoes?

No. Small red potatoes have thin, tender skins, so simply scrub them well and leave the skins on.

Can I use salted butter?

Yes, but don't automatically add extra salt. The onion soup mix already provides quite a bit of seasoning.

Can I cook these potatoes on HIGH?

Absolutely. Cook them for approximately 2–3 hours on HIGH, checking for fork tenderness toward the end.

Why are my potatoes taking longer to cook?

Slow cookers vary in temperature, and potato pieces can also vary in size. If the potatoes aren't tender yet, simply continue cooking until they can be easily pierced with a fork.

Can I make these potatoes ahead of time?

Yes. They're especially convenient for meal prep because the leftovers reheat well. For the best texture, crisp refrigerated leftovers in a skillet before serving.

Can I add other vegetables?

You can experiment with additions such as carrots or sliced onions, although adding ingredients changes the original three-ingredient recipe and may affect cooking time.

General Recipe Information

Prep time: About 10 minutes
Cook time: 4–5 hours on LOW or 2–3 hours on HIGH
Total time: Approximately 4–5 hours
Servings: 6
Cooking method: Slow cooker
Main ingredients: Red potatoes, butter, onion soup mix

Nutritional Information

Approximate nutrition will vary depending on the exact potatoes, butter, soup mix, and serving size used.

Per serving, this recipe may provide approximately:

• Calories: 350–400
• Carbohydrates: 45–50g
• Protein: 5–6g
• Fat: 17–20g
• Sodium: 700–900mg

For the most accurate nutritional information, calculate the recipe using the specific brands and quantities in your kitchen.

Conclusion

These Slow Cooker 3-Ingredient Onion Butter Potatoes are proof that a great side dish doesn't need a long ingredient list.

Just potatoes, butter, and onion soup mix come together in the slow cooker to create something wonderfully tender, savory, and comforting. It's the kind of recipe you can start earlier in the day and forget about until dinner—and those are some of my favorite recipes!

Serve them alongside roast beef, chicken, ham, or meatloaf, or save the leftovers for a crispy skillet breakfast the next morning.

Three ingredients. Almost no effort. And a whole lot of buttery onion flavor. Now that's a recipe worth keeping! 🥔🧈

If you make these potatoes, leave a review and share how they turned out. And if you snap a photo, share it on Pinterest so others can discover this wonderfully easy side dish too!