Some side dishes quietly sit beside the main course and let the entrée have all the attention. Then there are side dishes like these Slow Cooker Onion Butter Potatoes—the ones people notice immediately and somehow keep going back for.
I first started making these potatoes when I needed an easy side dish for a family get-together. There was already plenty happening in the kitchen, with grilled chicken, fresh vegetables, homemade rolls, and all the other little details that come with feeding a group. I wanted something simple that wouldn’t require me to stand over the stove or compete for precious oven space.
So I reached for my slow cooker, tossed in a few basic ingredients, and hoped for the best.
A few hours later, the smell of buttery potatoes and savory onion seasoning had filled the kitchen. By the time dinner was ready, the potatoes were tender, rich, and coated in a delicious layer of melted butter and onion flavor.
What surprised me most was how little effort they required.
That’s what makes this recipe so special. Baby potatoes, butter, and onion soup mix are all it takes to create a side dish that tastes like you spent much more time preparing it.
Whether you’re planning a holiday dinner, bringing food to a potluck, or simply looking for an easy side for a weeknight meal, these crockpot potatoes are worth adding to your recipe collection.
Why You’ll Love These Slow Cooker Potatoes
There are plenty of reasons these potatoes have become a favorite in my kitchen.
First, they are incredibly easy. Once the ingredients are added to the slow cooker, most of the work is finished.
Second, they’re versatile. You can serve them with chicken, steak, pork, turkey, meatloaf, ham, or roasted vegetables. They fit naturally into almost any dinner menu.
And perhaps most importantly, they’re delicious.
The potatoes slowly absorb the melted butter and savory onion seasoning as they cook. The result is tender potatoes with rich flavor in every bite.
Here’s why this recipe works so well:
- Only 3 main ingredients
- Minimal preparation
- No oven required
- Perfect for holidays and potlucks
- Great with almost any main course
- Easy to customize
- Excellent leftovers
When you have enough other things to worry about while preparing dinner, a side dish that can practically take care of itself is a wonderful thing.
What You’ll Need
The ingredient list couldn’t be simpler.
Ingredients
- 3 pounds baby potatoes, washed and halved if large
- 1 package dry onion soup mix
- ½ cup melted butter
That’s all you need for the basic recipe.
Baby potatoes are especially convenient because they require very little preparation. Simply wash them well and cut the larger ones in half.
Which Potatoes Are Best?
You have a few good choices depending on the texture you prefer.
Baby Yukon Gold potatoes have a naturally creamy, buttery texture and are one of my favorite choices for this recipe.
Red potatoes are also excellent because they tend to hold their shape well during slow cooking.
You can even use a combination of small potatoes if that’s what you have available.
The most important thing is to cut larger potatoes into similar-sized pieces so they cook evenly.
How to Make Slow Cooker Onion Butter Potatoes
This recipe comes together in just a few minutes.
Step 1: Prepare the Potatoes
Wash the baby potatoes thoroughly and remove any dirt.
If the potatoes are small, you can leave them whole. If they’re larger, cut them in half or into similarly sized chunks.
Place the prepared potatoes directly into your slow cooker.
Step 2: Add the Butter
Melt the butter and pour it over the potatoes.
Try to drizzle it evenly so as many potatoes as possible receive a little butter.
The butter will gradually coat the potatoes as they cook, creating that rich flavor that makes this side dish so irresistible.
Step 3: Add the Onion Soup Mix
Sprinkle the dry onion soup mix evenly over the butter-coated potatoes.
The soup mix provides the majority of the seasoning, adding a savory onion flavor without requiring several individual spices.
Step 4: Toss Everything Together
Use a large spoon or spatula to gently mix the potatoes, butter, and onion soup mix.
Continue tossing until the potatoes are evenly coated.
This small step makes a difference because you want the seasoning distributed throughout the entire batch rather than concentrated on just the top.
Step 5: Slow Cook
Place the lid on the slow cooker.
Cook on LOW for 5–6 hours or HIGH for 3–4 hours, depending on your schedule and the size of the potatoes.
If possible, give the potatoes a gentle stir once or twice during cooking. This helps redistribute the butter and seasoning.
Avoid opening the lid repeatedly, though, because slow cookers lose heat each time they’re opened.
Step 6: Check for Tenderness
The potatoes are ready when they can be easily pierced with a fork.
Cooking times can vary depending on the size of the potatoes and your particular slow cooker, so use tenderness as your best guide.
Once they’re tender, serve them hot.
Tips for the Best Onion Butter Potatoes
Although this is a very simple recipe, a few little tricks can make it even better.
Choose Similar-Sized Potatoes
If some potatoes are tiny and others are very large, they won’t cook at the same rate.
Try to use potatoes of similar size or cut larger potatoes so everything is relatively uniform.
Don’t Overcook Them
You want the potatoes tender but still intact.
Check them toward the end of the cooking time, particularly if your slow cooker tends to run hot.
Use Unsalted Butter
If you want more control over the final salt level, use unsalted butter.
Dry onion soup mix can already be quite flavorful, so starting with unsalted butter lets you adjust the seasoning later if needed.
Add Fresh Herbs
For a little color and freshness, sprinkle chopped fresh parsley over the potatoes immediately before serving.
Chives or green onions can also add a nice finishing touch.
Add Parmesan
For an extra savory flavor, sprinkle freshly grated or shredded Parmesan cheese over the hot potatoes just before serving.
The warmth of the potatoes will soften the cheese slightly and create another delicious layer of flavor.
Easy Variations
Once you’ve made the basic version, there are plenty of ways to change it.
Garlic Butter Potatoes
Add a little garlic powder or minced garlic along with the onion soup mix for extra savory flavor.
Cheesy Onion Potatoes
Add shredded cheddar or Parmesan during the final few minutes of cooking and allow it to melt over the potatoes.
Herb Butter Potatoes
Add fresh rosemary, thyme, or parsley for an herby variation that works especially well with roasted meats.
Bacon Potatoes
For an indulgent version, sprinkle cooked and crumbled bacon over the finished potatoes.
The smoky bacon pairs beautifully with the buttery onion seasoning.
What to Serve With Onion Butter Potatoes
One of the best things about these slow cooker potatoes is how versatile they are.
Serve them alongside roast chicken for an easy family dinner.
Pair them with grilled steak when you want something hearty and satisfying.
They’re also delicious with pork chops, especially when served with a simple vegetable on the side.
For a classic comfort-food meal, serve them with meatloaf.
They also work beautifully with baked ham, making them a useful side dish for holiday dinners.
If you prefer a lighter meal, pair the potatoes with roasted vegetables and a fresh green salad.
The possibilities are almost endless because buttery onion potatoes complement so many main dishes.
Perfect for Holidays and Potlucks
These potatoes are especially useful when you’re feeding a crowd.
During holidays, oven space can become one of the biggest challenges in the kitchen. Between the turkey, ham, casseroles, rolls, and desserts, there’s rarely room for another baking dish.
That’s where the slow cooker comes in.
You can prepare these potatoes without using the oven, freeing up valuable space for other dishes.
They’re also easy to transport if you’re bringing them to a potluck. Keep them warm in the slow cooker and serve directly from the crockpot.
How to Store Leftovers
If you happen to have leftovers, don’t worry—these potatoes reheat nicely.
Allow them to cool before transferring them to an airtight container. Store them in the refrigerator and enjoy within 3–4 days.
Reheat individual servings in the microwave or warm larger portions gently in the oven.
If the potatoes seem a little dry after refrigeration, add a small amount of butter before reheating.
You can also transform leftovers into a completely different meal by adding them to breakfast skillets, omelets, or a simple egg-and-potato hash.
Frequently Asked Questions
Can I use regular potatoes?
Yes. Baby potatoes are convenient and have a great texture, but regular Yukon Gold or red potatoes can also work. Simply cut them into similarly sized pieces.
Do I have to peel the potatoes?
No. Baby potatoes have thin skins, so peeling isn’t necessary. Just wash them thoroughly before cooking.
Can I cook them on HIGH?
Yes. Cook them on HIGH for approximately 3–4 hours, checking for tenderness toward the end.
Can I make these potatoes ahead?
Yes. You can prepare the potatoes and ingredients in advance, then cook them when needed. They are also excellent for keeping warm during a gathering.
Can I add cheese?
Absolutely. Parmesan, cheddar, Monterey Jack, or another melting cheese can be added near the end of cooking.
Recipe Card
Slow Cooker Onion Butter Potatoes
Prep Time: 10 minutes
Cook Time: 5–6 hours on LOW or 3–4 hours on HIGH
Servings: 6–8
Ingredients
- 3 pounds baby potatoes, washed and halved if large
- 1 package dry onion soup mix
- ½ cup butter, melted
Instructions
- Wash the potatoes thoroughly and cut larger potatoes in half.
- Place the potatoes in the slow cooker.
- Pour the melted butter evenly over the potatoes.
- Sprinkle the dry onion soup mix over the top.
- Toss gently until the potatoes are evenly coated.
- Cover and cook on LOW for 5–6 hours or HIGH for 3–4 hours.
- If possible, gently stir once or twice during cooking.
- Cook until the potatoes are tender when pierced with a fork.
- Garnish with fresh parsley or Parmesan if desired.
- Serve hot with your favorite main dish.
Final Thoughts
These Slow Cooker Onion Butter Potatoes are proof that you don’t need a long ingredient list to make an unforgettable side dish.
With just potatoes, butter, and savory onion seasoning, the slow cooker creates something that tastes rich, comforting, and completely homemade.
What I love most is how practical they are. You can prepare them while working on the rest of dinner, and you don’t have to worry about taking up valuable oven space or standing over a pot on the stove.
Whether you’re serving roast chicken on a Sunday, steak on a weeknight, ham during the holidays, or simply putting together an easy family dinner, these potatoes fit right in.
Add some fresh parsley for color, Parmesan for extra savory flavor, or keep them exactly as they are.
Sometimes the simplest side dishes are the ones people remember—and these buttery onion potatoes are definitely worth making again and again.