Place the bowl in oven and microwave it for 20 to 30 seconds or until the Vaseline is soft and watery.
Note: If you do not have a microwave oven, then you can melt the Vaseline over low heat in a double boiler. Secondly, simply put some Vaseline or petroleum jelly in a small plastic bag, seal it and float it into a bowl of hot water to soften it.
Once the Vaseline/ petroleum jelly is soft, remove the bowl from oven and add in some cocoa powder to the melted Vaseline / petroleum jelly before it cools. The main purpose of adding in cocoa powder to add flavor to the lip balm therefore add the amount according to your requirement and taste.
Pick a small spoon or an ice-cream stick and mix both of the ingredients for a few second until they are mixed into one another and form a well-blended chocolate lip balm.
Note: You can also mix the ingredients with the tip of your index finger, but make sure to wash your finger before and after mixing them.