Mash part of the potatoes in the broth, then finish the dairy gently.
Use the potatoes already in the pot
Russet potatoes soften as they cook. Crushing some of those cooked pieces disperses starch and fine potato solids through the broth, making the soup thicker without adding flour. Mash directly in the pot and leave the other pieces intact for texture.
BUI’s recipe calls for 3 lb peeled, ½-inch russet cubes, 3½ cups water , and a 15–20-minute covered simmer before mashing about 50% of the potatoes. They provide one practical starting point for a thick potato soup.
Add milk or cream after the potatoes soften
The recipe adds two cups of whole milk or heavy cream only after the mashing stage. It then adds white pepper, nutmeg and salted butter, followed by a gentle five-minute uncovered simmer.
Keeping the heat gentle after adding dairy helps limit sticking, excessive reduction and separation. Avoid a hard boil; check the thickness by stirring and watching how the soup coats the spoon.
Keep some texture
- Too much mashing can make every spoonful uniformly pasty; this tested version leaves about half the pieces intact.
- If the soup looks thin before mashing, wait until the potatoes are fully tender before judging the finished texture.
- Top with the reserved crispy bacon just before serving, so it stays distinct from the creamy base.
In the BUI kitchen
These recipes use the technique discussed above: