For the cream of parsnip soup, chop the onion and cook in a large pot with the butter until translucent. Peel the parsnips and cut them into cubes.
Once the onion is nicely sautéed, add the parsnips and slowly sauté for at least 5 minutes until they are very soft. Then pour in the vegetable soup and bring to a boil.
Turn down the heat, season and simmer until the parsnips are soft. Now add the sour cream, bring to the boil again briefly and then puree with a hand blender. Done!
Preparation Tip:
The cream of parsnip soup can be sprinkled either with roasted bacon cubes or croutons. This gives the soup the final touch.