From the brewery:

The appearance of this exceptional beer is matched only by its taste! To make our Framboise, we add raspberry juice to our lambic. That gives it a delicate fruity aroma and a beautiful dark pink colour, just like the dress I wore to our cousin Willy's wedding. (But that's of no interest to you since you undoubtedly don't know Willy). Framboise is served as an aperitif, but I also use it in cooking. And when I don't finish the bottle in my preparations, I finish it in my glass.