Slow Cooker 3-Ingredient Onion and Potato Soup

This Onion and Potato Soup is the essence of humble comfort—sweet caramelized onions and tender potatoes simmered into a rich, velvety broth, all made with just three simple ingredients. No cream, no flour, no fuss. The potatoes naturally thicken the soup as it cooks, creating a luxuriously smooth texture that tastes like it’s been simmering for hours.

Perfect for chilly evenings, busy weeknights, or when you need a warm, nourishing bowl with minimal effort.

Why You’ll Love This Recipe

🥣 Only 3 ingredients—pantry staples!
⏱️ 10 minutes prep, then walk away
💛 One slow cooker = easy cleanup
💸 Costs under $5—feeds 4–6 generously
🌾 Naturally gluten-free, nut-free, and vegan (as written)

Ingredients You’ll Need

(6-quart slow cooker)

2 lbs (900g) yellow or russet potatoes, peeled and cubed
2 large yellow onions, thinly sliced
4 cups low-sodium vegetable or chicken broth
- Optional but recommended:
  - 2 tbsp butter or olive oil (for richness)
  - Salt & black pepper to taste
  - Fresh thyme or bay leaf

💡 Pro Tips:
Slice onions thin—they melt into the soup beautifully.
Don’t skip the broth quality—it’s the flavor base.
For extra creaminess: Blend half the soup at the end (or mash with a potato masher).