I'm not really into big,heavy drink one & fall over beers myself. But I did come up with a recipe for the old #3 Burton ale from the 1890's that sounded good. Came out real well at 6.8%. Def strong ale territory. You basically use a lot more malt (grains,extracts,etc) to get a high OG,like 1.070+ roughly. Your FG will be correspondingly higher as well. Look in the recipe section for some examples of high gravity ales.