A dirty blast is a drink used in the first subquest of Recipe for Disaster. It is made by adding ashes to a player-madefruit blast, requiring 10 Cooking. The fruit blast obtained from The Dig Site quest can also be used - however, its pre-made counterpart obtained from Blurberry Bar will NOT work to make it. Additionally, you cannot add the ashes until after the quest begins. Creating a dirty blast gives 5 Cooking experience.