I think Yukon Gold and yellow potatoes are the best potatoes for soup. They hold their shape when cooked, and they have an amazing creamy texture when blended. This soup is partially blended, so you get to enjoy them both ways! They have a nice buttery flavor too. I wouldn't use russet potatoes here, as they fall apart as they cook.
Chasing the ultimate mashed potatoes recipe? Stop clicking. This easy recipe yields supremely fluffy, ultra-creamy results that will complement Thanksgiving turkey, weeknight meatloaf, Sunday fried chicken, and anything else you can think of to serve with a pile of potato clouds. Yukon Golds reign supreme here-rich in flavor and naturally silky even before you add dairy, but yes, russets will work in a pinch.