Source: honolulumagazine
Chocolates and RS gold
A Chocolate bar can be consumed to restore 200 health points. It is often use as an ingredient using Cooking skill and can also turn chocolate bar into chocolate dust which is a secondary ingredient for energy potions. The chocolate bar can be use as a source of RS gold by selling them at the Grand exchange but it is more profitable if you turn them into chocolate dust since it is more demanding than the bar.
Making RS gold with Chocolate
The only tools you need in this guide are knife. You don’t need skills here so it is quite easy and simple. Once you have a knife, go to the Grand Exchange. Buy as many Chocolate Bars as you can or until your inventory is full. Once you have more Chocolate bars, turn the entire Chocolate bars into chocolate dust by right clicking them. Resell the chocolate dust at the Grand Exchange to gain more RS gold.