Toss carrots with olive oil, paprika, salt and pepper, until evenly coated. Spread in a single layer on a baking sheet and roast until just tender, about 30-35 minutes. (May be shorter or longer depending on how thick your carrots are).
While carrots roast, make the ranch. Combine all ranch ingredients in a blender or food processor and blend until smooth. Additional buttermilk can be added to achieve a thinner consistency if desired. Season to taste with additional salt and pepper as needed.
Serve carrots warm with plenty of ranch, and a sprinkling of chopped chives on top.