Directions

1. In a medium-size saucepan with a lid, melt butter over medium heat. Reserve 1/2 cup carrots and add remaining carrots to saucepan along with onion, garlic, ginger, sugar, 2 teaspoons salt, and a pinch of pepper; stir to combine. Reduce heat to medium-low, cover, and cook until carrots are soft, 10 to 15 minutes.
2. Meanwhile, heat oil in another medium-size saucepan over medium heat. Add reserved 1/2 cup carrots, parsnips, and season with salt and pepper. Cook, stirring, until they begin to color slightly, about 2 minutes. Cover and cook until tender, about 5 minutes more.
3. Increase heat to medium-high and add vinegar, stirring to coat; cook for 1 minute. Remove from heat and divide vegetable mixture evenly between 4 soup bowls.
4. Add chicken broth and milk to carrot and onion mixture; season with salt and pepper. Bring to a boil and working in batches, transfer to the jar of a blender (do not fill more than halfway); loosely cover and carefully puree until very smooth and frothy. Pour soup over vegetables in soup bowls and garnish with parsley. Serve immediately.