ABV- 8% Kasteel Rouge is a unique blend of Kasteel Donker and a sweet cherry liqueur. This fruity beer makes a great aperitif on a sunny terrace. It’s certainly a beer for lovers of sweet cherries with an overpowering aroma of the fruit. The cherries get the better of the malt in the Kasteel Donker mother beer, although it contributes touches of chocolate and pepper to remind you it’s there. It is surprisingly easily digestible for quite a strong beer.