Ruster Ausbruch (not Ausbruscher) is indeed a term associated with winemaking, specifically referring to a prestigious sweet wine from the town of Rust (Rust), located on the western shores of Lake Neusiedl (Neusiedlersee) in the Burgenland region of Austria. The term "Ausbruch" denotes a level of sweetness in Austrian wine, situated between Beerenauslese and Trockenbeerenauslese, which are classifications based on the sugar content in the grapes at the time of harvest. These categories are part of the Prädikatswein system used in Germany and Austria to classify wines by the ripeness of the grapes, and consequently, their potential alcohol or sweetness levels.

Ruster Ausbruch wines are known for their exceptional quality and are made from grapes affected by noble rot (Botrytis cinerea), which dehydrates the grapes, concentrating the sugar and flavors. The result is a rich, sweet wine with a balanced acidity, highly valued by wine enthusiasts around the world. The production of Ruster Ausbruch is labor-intensive, as it often requires hand-picking the botrytized grapes, leading to limited quantities and higher prices.

The town of Rust and its wines, especially the Ausbruch, have a long history and a strong reputation for quality. These wines are typically made from white grape varieties such as Welschriesling, Chardonnay, and Furmint, among others. Ruster Ausbruch can be enjoyed on its own or as a complement to desserts and certain cheeses, and it has a significant aging potential.