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+ servings
potato soup in a black bowl with a spoon on a wooden board.

4 Ingredient Potato Soup

My easy 4 Ingredient Potato Soup recipe uses basic ingredients to make a thick and creamy potato soup the whole family will love.
Course Dinner
Cuisine Modern Australian
Total Time 35 minutes
Servings 4
Calories 346kcal


  • 1 kg potatoes peeled and evenly diced
  • 1 medium brown onion diced
  • 350 ml whole milk or more to taste
  • 55 g salted butter divided


  • In a large heavy-based pot, melt 15g of the butter over medium heat.
    55 g salted butter
  • Add diced onions and saute over medium-high heat until soft, then remove to a plate.
    1 medium brown onion
  • Add diced potatoes to the pot and fill with water (enough to cover the potatoes by about 2½ cms (1 inch).
    1 kg potatoes
  • Bring to the boil, then turn down to a simmer and continue to cook until potatoes are soft and fork tender (but not falling apart) - usually about 15 to 20 minutes.
  • Once potatoes are soft, spoon out approximately 1 cup of cooking water and reserve. Drain the remaining water and return the potatoes to the pot.
  • Add remaining butter to the potatoes and mash until to your liking.
    55 g salted butter
  • Over low heat add back cooked onions, then add milk and salt and pepper to taste, using more milk plus some reserved cooking water to achieve your desired consistency.
    350 ml whole milk
  • Serve once heated through.


  • Try to dice your potatoes into even size pieces, this way they will cook evenly.
  • This hearty soup is all made in the one pot, so you will need to use a pot that is big enough to hold all of the finished soup.
  • Sauteing the onion in butter is important to add flavour to this soup. Please don't skip that step!
  • You can use a potato masher to make this soup to be whatever consistency you like, depending on how well you mash the cooked potatoes. If you leave the potatoes quite chunky, the soup will be thin but with potato chunks. More mashing will give you a smoother, thicker end product with less "lumps".
  • Once you have added the liquid, you could blend it using an immersion blender (stick blender) to get a super smooth and creamy texture. Make sure it is off the heat to do this.
*Please note that the amount of calories per serve is provided as a guide only, as ingredients and cooking methods can vary greatly*


Calories: 346kcal