Which topping adds a rich buttery taste to a potato?

The choice that adds a rich buttery taste to a potato is the one that involves butter being topped on the potato. Butter is known for its creamy texture and rich flavor, which enhances the overall taste of the potato, making it more indulgent and enjoyable.

When butter is melted over a hot potato, it seeps into the flesh, enriching the taste and providing a satisfying mouthfeel. This classic combination elevates a simple baked or mashed potato into a comforting side dish that complements various entrees. The other options either don't incorporate this taste enhancement or imply the absence of toppings, which wouldn't provide that desired buttery flavor.