There are many ginger beer recipes. Some recipes add lemon juice, whereas others call for the addition of pineapples or raisins. In general, however, ginger beer is made by boiling water, sugar, and either grated ginger or ginger powder. Most recipes also include half a teaspoon of cream of tartar to break up and stabilize the sugar.  If you want to make alcoholic ginger beer, add some yeast after the mixture has cooled down to about 75 degrees Fahrenheit. You then want to lightly cover the mixture and let it stand for about three days in a warm room in order for the brew to ferment. You can then strain the beer, decant it in glass bottles, and place them in the fridge.