Slow Cooker Onion Butter Potatoes Recipe

Slow cooker onion butter potatoes are one of those comforting side dishes that quickly become a favorite at the table.

There are potato recipes you make because they’re easy, and then there are the ones people ask you to make again and again…

Instead of roasting them in the oven or watching a pan on the stove, everything cooks low and slow in the crockpot.

The butter melts into every bite, the onions become incredibly soft and sweet, and the potatoes turn perfectly tender without falling apart.

Onion butter potatoes is the kind of side dish that tastes like it took hours of effort, even though the slow cooker does almost all the work for you.

Whether you’re serving roast chicken, grilled steak, pork chops, or even a holiday dinner, these onion butter potatoes fit right in.

Ingredients for Onion Butter Potatoes

Serves 6 to 8

3 pounds baby Yukon Gold or baby red potatoes, washed and cut in half
1 large sweet or yellow onion, sliced into thick half moons
½ cup unsalted butter, melted
¼ cup chicken broth or beef broth
1 tablespoon chopped fresh thyme or rosemary, or 1 teaspoon dried herbs
1 teaspoon kosher salt
½ teaspoon black pepper
½ teaspoon garlic powder

1. Start with the onions

Spread the sliced onions across the bottom of your slow cooker. They’ll slowly soften as they cook and create a flavorful base for the potatoes.

2. Add the potatoes

Place the halved potatoes on top of the onions. Try to spread them out evenly so they cook at roughly the same pace.

3. Mix the butter sauce

In a small bowl, stir together the melted butter, broth, thyme, garlic powder, salt, and pepper until everything is well combined.

Pour the mixture evenly over the potatoes. Give everything a gentle toss with a spoon so the potatoes are lightly coated.

4. Let the slow cooker do the work

Cover and cook on LOW for 6 to 7 hours or HIGH for 3 to 4 hours.

The potatoes should be soft enough to pierce easily with a fork, while the onions will have cooked down into a buttery, flavorful mixture.

The potatoes are delicious straight from the slow cooker, but if you like a little color and texture, there is one extra step that’s worth it.

Transfer the cooked potatoes and onions to a baking tray, leaving the cooking liquid behind. Place them under the broiler for about 3 to 5 minutes until the tops begin turning golden brown.

That quick blast of heat creates lightly crisp edges while keeping the centers creamy and soft.

Baby Yukon Gold potatoes are ideal because they naturally have a creamy texture and hold their shape during slow cooking. Baby red potatoes work well too if you prefer a slightly firmer bite.

Using garlic powder instead of fresh garlic also makes a difference. Fresh garlic can become bitter after several hours in the slow cooker, while garlic powder keeps the flavor smooth and balanced.

The small amount of broth helps create steam inside the slow cooker, allowing the potatoes to cook evenly while blending with the butter to create a rich sauce.

These onion butter potatoes are perfect for preparing in advance because the flavors continue developing after they sit for a few hours.

Store leftovers in an airtight container in the refrigerator for up to 4 days.

For the best texture, warm the potatoes in a skillet over medium heat with a splash of broth or water. This brings back some of their buttery exterior while keeping the inside soft.

You can also reheat them in the microwave if you’re short on time.

Freezing is not recommended.

Cooked potatoes contain a lot of water, and once frozen and thawed, that moisture changes the texture. Instead of staying creamy, they often become grainy or slightly spongy.

For the best flavor and texture, enjoy these potatoes fresh or within a few days from the refrigerator.

These onion butter potatoes pair well with almost any main course, including:

Roast chicken
Steak
Grilled pork chops
Meatloaf
Baked salmon
Holiday turkey
Slow cooked beef roast

Finish everything with a little fresh parsley, extra thyme, or a sprinkle of Parmesan cheese just before serving for even more flavor.

The fresh herbs brighten up the rich buttery sauce, while the Parmesan adds a savory finish that pairs perfectly with the tender onion butter potatoes.

Serve the onion butter potatoes straight from the slow cooker or transfer them to a serving dish for family dinners, holiday meals, or weekend gatherings.

Don’t be surprised if everyone comes back for seconds because these potatoes tend to disappear quickly.