Which beer style is exclusively made with wheat?

Witbier is a traditional Belgian-style wheat beer that is predominantly made with a significant proportion of wheat in addition to barley. The use of wheat contributes to its characteristic hazy appearance, light body, and refreshing mouthfeel. Witbiers are typically brewed with spices like coriander and orange peel, enhancing their flavor profile while still showcasing the unique characteristics of wheat.

In contrast, the other styles mentioned either predominantly use barley (like Barleywine and Pilsner) or may include it in their recipes but do not exclusively focus on wheat as their primary grain. Pilsner, for example, is primarily made with pale malted barley and is known for its crispness and bitterness. New England IPA also predominantly uses barley and is characterized by its hoppy and fruity flavors rather than wheat.

Thus, Witbier stands out as a style where wheat is the defining feature of its composition and flavor.