Rinse grated potatoes under cold water and pat dry with a kitchen towel.
Heat butter and oil in a large skillet over medium heat.
Spread the potatoes evenly in the skillet and press down with a spatula.
Cook for 4-5 minutes until golden brown, then flip carefully.
Sprinkle cheddar cheese over the top and cook for another 3-4 minutes.
Season with salt, pepper, garlic powder, and smoked paprika.
Serve hot, garnished with chopped green onions if desired.