What type of utensil is needed for the creole steak and prawns?

The correct utensil needed for the creole steak and prawns is a steak knife. This type of knife is specifically designed to cut through meat, which is essential for enjoying a steak. The serrated edge of the steak knife allows for a smooth cutting experience, making it ideal for slicing through the texture of the steak while also being effective for any accompanying prawns.

Using a steak knife ensures that diners can easily manage their meal, allowing them to enjoy the flavors and presentation of the dish without any hassle. Other utensils like a soup spoon, fork, or butter knife would not provide the necessary capability to cut through the steak effectively, thereby making the steak knife the most suitable choice in this context.