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Slow Cooker Onion Potatoes Recipe

Introduction

These are the easiest slow cooker potatoes you’ll ever make, requiring just five simple ingredients for perfectly tender, flavorful results. The slow cooker does all the work, making this an ideal side dish for busy weeknights or holiday meals. For another effortless slow cooker favorite, try this Crockpot Cranberry Sauce Recipe that pairs beautifully with these potatoes.

Ingredients

These simple ingredients transform into tender, flavorful potatoes with a rich onion aroma that will fill your kitchen as they cook.

  • 2 lbs potatoes, thinly sliced
  • 1 oz envelope onion soup mix
  • 1/2 cup extra virgin olive oil
  • 1/4 cup butter, melted
  • 1/4 teaspoon pepper
  • 1/4 teaspoon salt (optional, adjust to taste)

Slow Cooker Onion Potatoes ingredients

Timing

Prep Time 10 minutes
Cook Time 4 hours
Total Time 4 hours 10 minutes

Context: These Slow Cooker Onion Potatoes require about 20% less active cooking time than similar oven-roasted potato recipes.

Step-by-Step Instructions

Step 1 — Prepare Your Potatoes

Wash and scrub 2 pounds of small potatoes, such as red or Yukon Gold. You can peel them if desired, but leaving the skins on adds texture and nutrients. Cut larger potatoes into 1-inch chunks so they cook evenly.

Step 2 — Combine Onion Mixture

Thinly slice one large yellow onion. In a small bowl, whisk together ¼ cup olive oil, 1 packet of dry onion soup mix, 1 teaspoon garlic powder, and ½ teaspoon black pepper. This savory blend will coat every potato piece.

Step 3 — Coat Potatoes Evenly

Place potatoes and sliced onions in your slow cooker. Pour the seasoned oil mixture over them. Use a large spoon or your hands to toss until potatoes are thoroughly coated. This ensures the onion flavor penetrates deeply.

Step 4 — Set Cooking Time and Temperature

Cover and cook on HIGH for 3–4 hours or on LOW for 6–7 hours. The potatoes are done when easily pierced with a fork. Avoid overcooking, which can make them mushy.

Step 5 — Check for Doneness

Test a few potato pieces about 30 minutes before the minimum cooking time. They should be tender but still hold their shape. If needed, continue cooking in 15-minute increments.

Step 6 — Stir Gently

About halfway through cooking, gently stir the Slow Cooker Onion Potatoes to redistribute the onions and seasonings. Be careful not to break the potatoes—use a silicone spatula for best results.

Step 7 — Adjust Seasoning

Taste a potato piece once cooked. If desired, sprinkle with fresh chopped parsley and a pinch of salt. For extra richness, stir in 2 tablespoons of butter during the last 30 minutes of cooking.

Step 8 — Serve Warm

Transfer your Slow Cooker Onion Potatoes to a serving dish using a slotted spoon if excess oil remains. These make a perfect side for roasted meats, grilled chicken, or holiday meals.

Nutritional Information

Calories 180
Protein 4g
Carbohydrates 35g
Fat 4g
Fiber 4g
Sodium 320mg

Note: Estimates based on typical ingredients and serving size.

Healthier Alternatives

  • Sweet potatoes instead of russet potatoes — Adds more fiber and vitamins while keeping the slow cooker convenience.
  • Greek yogurt instead of sour cream — Boosts protein and reduces fat while maintaining creamy texture.
  • Cauliflower florets instead of potatoes — Creates a lower-carb version with a mild flavor that absorbs onion seasoning well.
  • Olive oil instead of butter — Makes these Slow Cooker Onion Potatoes dairy-free with heart-healthy fats.
  • Low-sodium broth instead of regular broth — Reduces sodium content while keeping the potatoes moist and flavorful.
  • Nutritional yeast instead of cheese — Adds cheesy flavor without dairy for those with lactose intolerance.
  • Turkey bacon instead of regular bacon — Provides smoky flavor with less fat for a lighter protein option.
  • Fresh herbs instead of seasoning packets — Eliminates hidden gluten and sodium while adding bright, fresh flavor.

Slow Cooker Onion Potatoes finished

Serving Suggestions

  • Pair these savory Slow Cooker Onion Potatoes with grilled chicken, steak, or meatloaf for a complete comfort meal.
  • Serve alongside roasted vegetables like carrots and green beans for a hearty vegetarian dinner.
  • Perfect for potlucks and family gatherings—the slow cooker keeps them warm throughout the event.
  • Top with fresh chopped parsley or chives and a sprinkle of grated Parmesan cheese before serving.
  • Accompany with a fresh garden salad to balance the rich, savory flavors of the potatoes.
  • Ideal for holiday meals like Easter or Thanksgiving—frees up oven space for other dishes.

For an elegant presentation, transfer the Slow Cooker Onion Potatoes to a warm serving dish and garnish with fresh herbs just before bringing to the table.

Common Mistakes to Avoid

  • Mistake: Cutting potatoes too small. Fix: Use 1-2 inch chunks to prevent them from turning to mush during the long cook time.
  • Mistake: Not using enough fat or liquid. Fix: Add a few tablespoons of oil or broth to create steam and prevent sticking.
  • Mistake: Overcrowding the slow cooker. Fix: Arrange potatoes in a mostly single layer for even heat circulation and cooking.
  • Mistake: Adding dairy ingredients too early. Fix: Stir in sour cream or cream cheese at the very end to avoid curdling.
  • Mistake: Using the wrong potato type. Fix: Choose waxy potatoes like red or Yukon Gold, which hold their shape better than starchy Russets.
  • Mistake: Skipping the step of tossing potatoes in seasoning. Fix: Coat potato chunks evenly in oil and seasonings before cooking for maximum flavor.
  • Mistake: Forgetting to layer onions properly. Fix: Place some onion slices at the bottom and intersperse them throughout for infused flavor.
  • Mistake: Cooking on too high a heat setting. Fix: Use the LOW setting for 5-7 hours to achieve tender, not disintegrated, Slow Cooker Onion Potatoes.
  • Mistake: Not checking for doneness. Fix: Test potatoes with a fork about an hour before the recipe’s suggested time, as slow cookers can vary.
  • Mistake: Lifting the lid frequently to check. Fix: Keep the lid closed to maintain a consistent temperature and cooking time.

Storing Tips

  • Fridge: Cool your Slow Cooker Onion Potatoes completely, then store in an airtight container for up to 4 days.
  • Freezer: Place cooled potatoes in a freezer-safe bag or container for up to 3 months. Thaw in the refrigerator before reheating.
  • Reheat: Warm in the oven at 350°F or in the microwave until the internal temperature reaches 165°F, stirring occasionally for even heating.

Always use a food thermometer to ensure your Slow Cooker Onion Potatoes are reheated to a safe temperature.

Conclusion

These Slow Cooker Onion Potatoes are the perfect easy side dish for any meal. We hope you love this simple recipe as much as we do! Give it a try and let us know how it turned out in the comments below. Don’t forget to subscribe for more delicious recipes like our Bacon Wrapped Little Smokies Recipe.

Print

Slow Cooker Onion Potatoes

Tender potatoes and onions slow-cooked in a savory blend of butter, broth, and seasonings, making a comforting and easy side dish.

  • Author: Dorothy Miller
  • Prep Time: 10 minutes
  • Cook Time: 4 hours
  • Total Time: 4 hours 10 minutes
  • Yield: 6 1x
  • Method: Side Dish
  • Cuisine: American

Ingredients

Scale
  • 2 lbs potatoes, thinly sliced
  • 1 oz envelope onion soup mix
  • 1/2 cup extra virgin olive oil
  • 1/4 cup butter, melted
  • 1/4 teaspoon pepper
  • 1/4 teaspoon salt (optional, adjust to taste)

Instructions

  1. Add sliced potatoes to a greased slow cooker.
  2. Sprinkle onion soup mix over the potatoes.
  3. Drizzle with olive oil and melted butter.
  4. Season with pepper and salt if desired.
  5. Cover and cook on high for 4 hours, or until potatoes are tender.

Notes

For a richer flavor, use a combination of butter and olive oil. Stir gently halfway through cooking if desired. This dish pairs well with grilled meats or as a vegetarian main.

Nutrition

  • Calories: 250
  • Sugar: 2
  • Sodium: 400
  • Fat: 16
  • Saturated Fat: 5
  • Unsaturated Fat: 10
  • Trans Fat: 0
  • Carbohydrates: 25
  • Fiber: 3
  • Protein: 3
  • Cholesterol: 10

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FAQs

Can I use other types of potatoes for Slow Cooker Onion Potatoes?

Yes, you can use Yukon Gold or red potatoes. Russets may become too soft. Adjust cooking time slightly if needed for your chosen potato type.

How long do Slow Cooker Onion Potatoes take to cook?

They typically take 4-5 hours on high or 6-8 hours on low. Check for tenderness with a fork. Avoid overcooking to prevent mushiness.

Can I prepare Slow Cooker Onion Potatoes ahead of time?

Yes, you can chop the potatoes and onions ahead. Store them in water to prevent browning. This makes assembling the dish quicker before cooking.

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Dorothy Miler

Pro Chef & Blogger
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