Ingredient Kits for All Grain and Partial Mash recipes. Partial Mash involves making a smaller grain brew of around 5 litres and then boiling with hops before combining with malt extract to make up to a full 40 bottle brew. These can be made by adding a large stock pot to your usual brewing equipment. All Grain brewing involves making the entire recipe from grain and hops without the addition of extract - an electric mash bin is useful for these All Grain kits.