Wash and peel the potatoes. Leaving a small amount of skin is acceptable if the potatoes have been scrubbed thoroughly and you prefer a rustic texture.
Cut the potatoes into ¾-inch cubes. Try to keep the pieces similar in size so they cook evenly.
Place the cut potatoes in a bowl of cold water while preparing the remaining ingredients. This prevents excessive browning. Drain them well before adding them to the soup.
Prepare the potatoes, vegetables, broth, milk, butter, and seasonings before starting the soup.
Step 2: Sauté the vegetables
Place a large, heavy-bottomed pot or Dutch oven over medium heat. Add the butter and let it melt.
Add the diced onion and celery. Cook for 5 to 6 minutes, stirring occasionally, until the onion becomes translucent and the celery begins to soften.
Do not rush this stage. Gently cooking the vegetables in butter develops more flavour than immediately boiling them in broth.
Step 3: Add the garlic and seasonings
Add the minced garlic, dried thyme, black pepper, and optional paprika.
Cook for approximately 30 seconds, stirring constantly. The garlic should become fragrant without turning brown.
Step 4: Make the roux
Sprinkle the flour evenly over the vegetables. Stir continuously for approximately two minutes.
The mixture will look thick and slightly pasty. Cooking the flour briefly removes its raw taste and prepares it to thicken the liquid.
Step 5: Add the broth gradually
Pour in approximately one cup of broth while whisking or stirring continuously.
Once the mixture is smooth, gradually add the remaining broth. Scrape the bottom of the pot to incorporate any flavourful browned bits.
Adding the liquid gradually helps prevent lumps.
Step 6: Cook the potatoes
Drain the diced potatoes and add them to the pot. Stir in the salt.
Increase the heat and bring the soup to a gentle boil. Reduce the heat to medium-low, partially cover the pot, and simmer for 12 to 15 minutes.
The potatoes are ready when a fork or small knife slides easily into the pieces.
Avoid a violent boil, which can cause the potato cubes to break apart before their centres are fully tender.
Simmer the soup gently until the potato pieces are completely tender.
Step 7: Mash some of the potatoes
Use a potato masher to gently mash approximately one-third of the potato pieces directly in the pot.
Alternatively, transfer 2 cups of soup to a blender, blend carefully, and return it to the pot.
If using a regular blender, do not completely seal extremely hot liquid inside. Allow steam to escape according to the appliance manufacturer’s instructions. An immersion blender is often more convenient.
Keep plenty of potato pieces intact to preserve the rustic texture shown in the reference photograph.
Step 8: Add the milk and cream
Reduce the heat to low. Stir in the whole milk and heavy cream.
Warm the soup gently for 3 to 5 minutes, stirring frequently. Do not allow it to boil aggressively after adding the dairy because excessive heat can cause separation or scorching.
Step 9: Adjust the consistency
If the Creamy Potato Soup is too thick, add a little extra broth or milk.
If it is thinner than you prefer, simmer it gently for a few additional minutes or mash more of the potatoes.
Remember that the soup will continue to thicken slightly as it rests and will become considerably thicker after refrigeration.
Step 10: Taste and serve
Taste the soup and adjust the salt, pepper, and thyme.
Ladle it into warm bowls or rustic soup mugs. Add a pat of butter to the centre, allowing it to melt over the surface. Finish with black pepper, chopped chives, cheese, or any other preferred toppings.
Important Tips for the Best Results
Cut the potatoes evenly
Small pieces cook faster than large ones. Uneven cubes can leave some potatoes falling apart while others remain firm.
Cook the flour before adding liquid
Flour needs one or two minutes of cooking in the butter to eliminate its raw, dusty flavour.
Add broth gradually
Pouring all the broth into the roux at once can create lumps. Begin with a smaller quantity and stir until smooth.
Simmer rather than boil
A gentle simmer cooks the potatoes evenly. Vigorous boiling may break them apart and can scorch dairy after it has been added.
Mash only part of the soup
Blending every potato produces a smooth purée but removes the comforting chunky texture. Mashing approximately one-third strikes a good balance.
Add dairy near the end
Milk and cream do not need prolonged cooking. Add them after the potatoes are tender and keep the heat low.
Once finished, Creamy Potato Soup should have a thick but spoonable consistency, with plenty of tender potato pieces remaining. If it becomes too thick, stir in warm broth or milk a little at a time.
Season after adding the broth
The amount of salt needed depends heavily on the broth. Start conservatively, taste near the end, and add more only if necessary.
Remember that the soup thickens
Do not make it excessively thick in the pot. As the soup cools, potato starch continues to absorb liquid.
