Bring pot of salted water to a boil. Peel and dice potatoes and boil in pot till potatoes are tender. Strain and set aside.
Steam cauliflower (I do mine in the same pot). Strain and return to pot.
Add half the potatoes, chicken broth, and milk to the pot. Blend with immersion blender.
Add remaining potatoes and season with salt, pepper, paprika, and garlic powder. (Sometimes I add a little chili powder). Simmer covered for 20 minutes
Cook bacon and chop into pieces. Dice chives. Add bacon, chives and sour cream to pot and stir. Simmer covered for 20 more minutes.