Creamy Herb & Potato Soup

Why This Creamy Herb & Potato Soup Works

As the onions cook in the olive oil, they soften and lose their sharp bite. They start to taste a little sweet, which keeps the soup from tasting flat. When the garlic and potatoes go in, the potatoes warm up in the oil first, so their outsides start to soften before the broth is added.

Once the chicken broth comes to a simmer, the potatoes slowly cook all the way through. Their starch starts to slip into the liquid, so the broth doesn’t stay thin. By the time the potatoes are tender, the soup has already started to thicken on its own.

Using the immersion blender only partway leaves some potato chunks while breaking down the rest. The broken potatoes release even more starch, which turns the soup creamy and thick without needing flour. When the heavy cream, butter, herbs, and cheese go in at the end, they spread through this starchy base and stay suspended in it, so the soup feels rich and smooth but still has a bit of texture.

Mistakes To Avoid

Letting the potatoes stay in big, uneven chunks means some pieces soften while others stay firm or even hard. Once blended, the soft parts turn to mush while the bigger pieces stay undercooked, so the soup ends up with a strange mix of gluey bits and tough bites.

Boiling the soup too hard instead of keeping it at a gentle simmer can break the potatoes down too fast on the outside while the centers stay a little firm. This makes the soup starchy and pasty, and it can also cause the bottom to catch and burn, giving the whole pot a scorched taste and smell.

Adding the cream and cheese while the soup is still at a strong boil often leads to curdling. The dairy can separate into little grainy bits and a thin liquid, so the soup looks split and loses that smooth, creamy feel.

Blending the soup completely until it is totally smooth can backfire. The potatoes release a lot of starch when over-blended, and the soup can turn thick, sticky, and almost glue-like instead of velvety with soft chunks.