Step 1/ 6
- 1 lbs mixed potatoes (russet and yukon gold)
In a large pot, cover potatoes with water and add a generous pinch of salt. Bring to a boil and cook until totally soft, 16 to 18 minutes. Drain and return potatoes to pot.
Step 2/ 6
Use a potato masher to mash potatoes until smooth.
Step 3/ 6
- ⅓ stick butter
- ⅛ cup milk
Meanwhile, in a small saucepan, melt butter and milk until warm.
Step 4/ 6
- ⅛ cup sour cream
Pour over warm milk-butter mixture and stir until completely combined and creamy. Add sour cream and stir until combined.
Step 5/ 6
- black pepper
Season mashed potatoes generously with salt and pepper.
Step 6/ 6
- ⅔ tbsp butter (for garnish)
Transfer potatoes to a serving bowl and top with remaining two tablespoons butter. Season with more pepper before serving.