Chocolate Syrup is a condiment that is only seen in the episode "Valentine's Day."
Chocolate Syrup, as its name suggests, is chocolate made in a syrup form. It appears to have much of the properties to bubble mix, except chocolate syrup is just as edible as normal chocolate.
Role in episode
It is used by SpongeBob to bubble-blow chocolate in a way similarly to blowing bubbles with bubble mix. He uses the chocolate syrup to blow a chocolate heart to give to Sandy and he also uses it to give a simulated plan of how to give Patrick his Valentine's present.