Onion and Potato Soup – Easy 3-Ingredient Slow Cooker Recipe

Introduction

This Onion and Potato Soup is a simple, hearty slow cooker recipe made with just three main ingredients. Tender potatoes, soft sweet onions, and rich beef broth slowly cook together to create a comforting soup with a rustic texture.

As the soup cooks, the onions become soft and flavorful while some of the potatoes naturally break down, helping create a slightly thicker, heartier broth. It’s an easy, budget-friendly meal that’s perfect for a cozy lunch or dinner.

Ingredients

• 3 large yellow onions, thinly sliced
• 4 large russet potatoes, peeled and cut into hearty chunks
• 6 cups beef broth

Optional for Serving

• Salt, to taste
• Freshly ground black pepper, to taste

Instructions

1. Prepare the Vegetables

Peel the onions and slice them thinly from root to tip.

Peel the russet potatoes and cut them into chunks about 1 to 1½ inches in size.

2. Layer the Ingredients

Scatter the sliced onions evenly across the bottom of a large slow cooker.

Place the potato chunks on top of the onions in an even layer.

3. Add the Broth

Pour the beef broth over the onions and potatoes, making sure the vegetables are mostly covered.

Gently press the vegetables down into the liquid if necessary.

4. Slow Cook

Cover the slow cooker and cook until the onions are very soft and the potatoes are fork-tender.

• LOW: 8–10 hours
• HIGH: 4–5 hours

5. Finish the Soup

Once cooked, gently stir the soup from the bottom to distribute the softened onions throughout the broth.

Some of the potatoes may naturally break apart, helping thicken the soup. For an even creamier texture, gently mash some of the potatoes directly in the slow cooker.

Taste and season with salt and black pepper if desired.

6. Serve

Ladle the hot soup into bowls, making sure each serving contains plenty of tender potatoes, soft onions, and flavorful broth.

Variations & Tips

• Try a different broth: Chicken broth creates a lighter flavor, while vegetable broth makes the recipe meatless.
• For a thicker soup: Use a potato masher to gently crush some of the cooked potatoes.
• Keep it simple: This recipe is delicious because of its minimal ingredients, so there’s no need to overcomplicate it.
• Serving idea: Enjoy with crusty bread, crackers, or a simple sandwich.

Conclusion

This Onion and Potato Soup proves that simple ingredients can create a warm and satisfying meal. With tender potatoes, sweet softened onions, and rich broth, this easy slow cooker soup is comforting, budget-friendly, and perfect for busy days.