Slow Cooker Onion Butter Potatoes

Tender, buttery potatoes slow-cooked with sweet caramelized onions — the easiest hands-off side dish you’ll ever make.

If you’re looking for a set-it-and-forget-it side dish that always comes out perfect, these Slow Cooker Onion Butter Potatoes are it. Soft, buttery potatoes slow-cooked with sweet onions and rich butter, all melting together into a comforting, flavorful side that pairs with just about any main dish.

No babysitting the stove, no last-minute prep — just load up the slow cooker and let it do the work.

Why You’ll Love This Recipe

• Hands-off cooking — perfect for busy days or holiday meal prep
• Only a handful of ingredients — simple pantry staples
• Frees up oven space — ideal for holidays when the oven is packed
• Rich, buttery flavor — sweet caramelized onions make all the difference

Ingredients

• 3 pounds baby potatoes, halved
• 1/2 cup unsalted butter, cubed
• 1 large yellow onion, thinly sliced
• 1 packet onion soup mix (or 2 tablespoons dry onion soup seasoning)
• Salt and pepper, to taste
• Fresh parsley, chopped, for garnish (optional)

Instructions

1. Layer the ingredients. Place the halved potatoes and sliced onion into the slow cooker, tossing gently to combine.
2. Add the seasoning. Sprinkle the onion soup mix evenly over the potatoes and onions, then season with salt and pepper.
3. Add the butter. Scatter the cubed butter evenly over the top.
4. Cook. Cover and cook on LOW for 6-7 hours, or on HIGH for 3-4 hours, until the potatoes are fork-tender and the butter has fully melted into the mixture.
5. Stir and serve. Give everything a gentle stir to coat the potatoes in the buttery onion mixture. Garnish with fresh parsley before serving.

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