There are times to question, and times not to question - and this is a ‘not to’ time. Just make these and all will be well. And yes you can use russet potatoes, but they just won’t be as good :)
3 pounds Yukon Gold potatoes, peeled and cut into even pieces
1/4 cup butter
3/4 cup whipping cream
Kosher salt & pepper to taste
Optional things to add…just because
Blue cheese & sautéed red onion
Bacon & diced green chilies
Minced chipotle peppers and shredded Monterey Jack cheese
Put peeled potatoes in a pot, cover with water and add a pinch of salt
Bring to a boil, turn down to a simmer and cook covered until tender enough to poke a small knife through, about 15-20 minutes
While they cook, melt butter with cream and warm through
Drain potatoes and using a potato rice (preferred) or potato masher get them back into the pot mixed
Add butter cream mixture and season to taste with salt & pepper
If you’re going to add anything optional - now’s the time