Chocolate Syrup is an object 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 the series
It is used by SpongeBob to bubble-blow chocolate in a way similarly to blowing bubbles with bubble mix. He uses chocolate syrup to blow a chocolate heart to give to Sandy, and he also uses chocolate syrup to give a simulated plan of how to give Patrick his Valentines present.