Irish Colcannon by Rebooted Mom

russet potatoes, butter, green onions, kale, milk or heavy cream, salt pepper

– 4 russet potatoes (peeled and diced)
– 3 tbsp + 2 tbsp unsalted butter (divided)
– 3 green onions
– 3 C. chopped kale (chard, or cabbage)
– 1/2 C. full fat milk or heavy cream
– salt/pepper to taste