Add chicken broth and salt. Cook on low for 6-7 hours or low 3-4.
Add all ingredients and mash or blend until smooth. Do not over whip.
For pressure cooker
Add all ingredients to pot. Cover with enough water to cover all of the potatoes. Place lid on lock and valve to no venting. Press steam and set to 15 minutes. Do an immediate release and mash or blend until smooth. Do not over whip!