Place the cubed potatoes in a large dutch oven. Pour water over the potatoes so that they are completely covered.
Bring the potatoes to a boil. Reduce the heat and let simmer for 20 minutes, until the potatoes are fork tender. Drain the water, and return the potatoes to the pot.
Mash the potatoes until relatively smooth. A few lumps are okay.
Add the sour cream, butter, dry ranch seasoning mix, and fresh chives to the pot. Mix until combined.
Serve with additional butter and fresh chives if desired.
Video
Notes
If russet potatoes aren’t available, you can also use yukon gold potatoes. You don’t have to peel yukon gold potatoes if you don’t want to, but I like to for this recipe.
If you don’t have fresh chives, you can use a combination of fresh dill, green onions, parsley, etc.
Taste your mashed potatoes after adding the ranch seasoning and herbs. Mine did not need any salt, but depending on which ranch seasoning mix you use, your mashed potatoes may need salt or pepper. Season to taste.