Perfect rice is always a 2:1 ratio: two parts liquid to one part rice. Cooking with beer is a little tricky. Depending on the style of beer, beer is upwards to 95% water. Ethanol (the alcohol in beer) has a boiling point of 78°C (172.4°F) and will “gas off” at that temperature. Water, on the other hand, boils and becomes steam at 100°C (212°F). By the time the beer has reached the point where the rice begins to cook, the alcohol has long since “gassed off.”