Which type of steak has dairy and is served with a steak knife?

The pepercorn steak is known for its distinctive flavor, which comes from the use of a creamy peppercorn sauce. This sauce, often made with cream or other dairy ingredients, enhances the taste of the steak, complementing its savoriness with a rich, creamy element. Additionally, the dish is typically hearty enough to warrant a steak knife for optimal cutting, as the steak itself is usually thick and cooked to the patron's preference, ensuring a satisfying dining experience.

In this context, the other steak options may either not include dairy in their preparation or not necessitate a steak knife due to their size and texture. Thus, the pepercorn steak uniquely qualifies as the correct choice.