Slow Cooker 3-Ingredient Onion Butter Potatoes
If you’re searching for the easiest slow cooker potato recipe, these 3-ingredient onion butter potatoes are about to become your new favorite side dish. Made with just red potatoes, butter, and dry onion soup mix, this recipe delivers rich, buttery flavor with almost no effort. It’s the kind of comforting, old-fashioned dish that tastes like it simmered all day because it did.
Perfect for busy weeknights, potlucks, holidays, or Sunday dinners, these slow cooker potatoes come out tender, glossy, and packed with savory onion flavor every single time.
Why You’ll Love These Slow Cooker Onion Butter Potatoes:
Only 3 simple ingredients no chopping onions or extra seasoning
Hands-off slow cooker recipe let the crockpot do all the work
Budget-friendly and family-approved
Rich, buttery, caramelized flavor without frying or roasting
Perfect side dish for meatloaf, pot roast, chicken
Great for meal prep and leftovers (they reheat beautifully!)
Servings: 6
Prep Time: 10 minutes
Cook Time: 4–5 hours (LOW)
Ingredients:
3 pounds small red potatoes, scrubbed and quartered
½ cup (1 stick) butter, melted
2 packets (1 oz each) dry onion soup mix
Instructions:
Wash and scrub the red potatoes, then cut them into evenly sized quarters. Keeping the skins on adds texture and helps them hold their shape.
Lightly grease the slow cooker and place the potatoes inside in an even layer.
Melt the butter and stir in the dry onion soup mix until fully combined and fragrant.
Pour the onion butter mixture over the potatoes and gently toss until every piece is well coated.
Cover and cook on LOW for 4–5 hours or HIGH for 2–3 hours, stirring once or twice near the end for even flavor.
Once fork-tender and glossy, spoon the potatoes onto a serving dish and drizzle with the rich onion butter sauce.
Variations & Pro Tips:
Use Yukon Gold potatoes for a creamier texture
Swap in salted butter for a bolder flavor (taste first!)
Let some potatoes rest against the edges of the slow cooker for extra caramelization
Leftovers crisp up beautifully in a skillet for breakfast potatoes
Serving Ideas:
These buttery slow cooker potatoes pair perfectly with:
Meatloaf
Pot roast
Grilled or roasted chicken
Smoked sausage
Add green beans, peas, or a fresh salad for a complete meal.
