Imagine everything you love about a loaded baked potato, then turn it into a thick, velvety bowl of soup. That is baked potato soup: creamy, cheesy, and endlessly comforting, the kind of meal that warms you from the inside out on a cold evening.
This vegetarian version keeps all the cozy indulgence with none of the fuss. Tender potatoes are simmered until soft, then partly mashed into a rich, silky base and crowned with all the classic toppings you would pile onto a spud.
It is humble, hearty, and deeply satisfying, the sort of soup people ask for again and again. Grab a big pot and let’s get cozy.
Prep: 15 mins Cook: 35 mins Serves: 4-6
Why You’ll Love This Baked Potato Soup
- Thick, creamy, and rich without needing anything fancy.
- All the loaded-potato toppings you crave, from cheese to chives.
- Made in one pot for an easy cleanup after a comforting meal.
- Budget-friendly and filling, feeding a crowd on simple ingredients.
- Vegetarian and easily adaptable to lighter or dairy-free needs.
Ingredients
- 1 kg / 2 lb starchy potatoes such as russets, peeled and diced
- 1 onion, finely chopped
- 3 cloves garlic, minced
- 3 tablespoons butter, for the base
- 3 tablespoons plain flour, to thicken
- 750ml / 3 cups vegetable stock
- 500ml / 2 cups whole milk, warmed slightly
- 120ml / 1/2 cup sour cream, plus more to serve
- 150g / 1.5 cups cheddar cheese, grated, plus extra to top
- Salt and pepper, to taste
- 2 tablespoons chopped chives or green onions, to garnish
- Optional toppings: extra cheese, crispy fried onions, or bacon bits
Instructions
- Cook the potatoes. Place the diced potatoes in a large pot, cover with water, and bring to a boil. Simmer for about 12 to 15 minutes, until just tender, then drain and set aside.
- Build the flavor base. In the same pot, melt the butter over medium heat. Add the onion and cook until soft and translucent, about 5 minutes, then stir in the garlic for another minute until fragrant.
- Make a roux. Sprinkle in the flour and stir constantly for 1 to 2 minutes to cook out the raw taste. This is what gives the soup its luxurious thickness.
- Add the liquids. Gradually pour in the vegetable stock while whisking, then the warm milk, stirring to keep the soup smooth. Bring it to a gentle simmer.
- Return the potatoes. Add the cooked potatoes back to the pot and simmer for 10 minutes so they soak up the flavor and start to break down.
- Thicken to your liking. Use a potato masher or the back of a spoon to mash about half the potatoes right in the pot. This creates a creamy base while leaving plenty of hearty chunks.
- Stir in the dairy. Lower the heat and mix in the sour cream and grated cheddar, stirring until the cheese melts and the soup turns glossy. Do not let it boil once the dairy is in.
- Season well. Taste and add salt and plenty of black pepper. Starchy soups need generous seasoning to sing.
- Serve loaded. Ladle into bowls and top with extra cheese, a dollop of sour cream, chopped chives, and any other favorite toppings.
Tips for the Best Baked Potato Soup
- Use starchy potatoes like russets, which break down into a naturally creamy, fluffy base.
- Do not boil after adding dairy. High heat can cause the milk and sour cream to split, so keep it gentle.
- Mash only part of the potatoes for the best texture: creamy and thick but still satisfyingly chunky.
- Warm the milk first before adding it to prevent the soup from cooling too much or curdling.
- Season generously and taste at the end, as potatoes soak up a lot of salt.
Variations & Substitutions
- Dairy-free: use olive oil, a plant-based milk, and dairy-free cheese and cream alternatives.
- Lighter version: swap some milk for extra stock and reduce the cheese for a leaner bowl.
- Extra veg: stir in sweetcorn, leeks, or a handful of spinach near the end.
- Smoky twist: add a pinch of smoked paprika for a subtle, warming depth.
How to Store & Reheat
Let the soup cool, then store it in an airtight container in the fridge for up to 4 days. Reheat gently on the stovetop over low heat, stirring often and adding a splash of milk or stock to loosen it, since it thickens considerably once chilled. Avoid a rolling boil so the dairy stays smooth. This soup can be frozen, though the texture may change slightly; thaw overnight in the fridge and whisk well as it reheats to bring it back together.
What to Serve With It
A bowl of this soup is a meal on its own, but a hunk of crusty bread or a warm dinner roll is perfect for dunking. Pair it with a crisp green salad to balance the richness, or serve smaller cups alongside a toasted cheese sandwich for the ultimate comfort-food lunch.
Frequently Asked Questions
What are the best potatoes for potato soup?
Starchy varieties like russets are ideal because they soften and break down easily, giving the soup a thick, creamy body. Waxy potatoes hold their shape more, which is better if you prefer a chunkier, brothier texture.
How can I thicken potato soup?
The roux of butter and flour does most of the work here, but you can thicken it further by mashing more of the potatoes or simmering it a little longer to reduce. A splash of extra cheese also adds richness and body.
Why did my soup turn grainy?
Graininess usually happens when dairy is added over heat that is too high or brought to a boil. Add the sour cream and cheese off a hard boil, keep the heat low, and stir until just melted for a silky finish.
Warm, creamy, and loaded with all your favorite toppings, this baked potato soup is comfort in a bowl. Ladle it up, pile on the cheese, and settle in.