Primary ingredient: sugar at 49% and palm oil and rapeseed oil both as they state sourced from well-managed plantations, making up majority of that spread.
In this instance, I'm using rapeseed oil rather than olive oil, but again, use one that you like, one that you have, and one that's got a little bit of flavor but isn't too overpowering.
Compared with traditional biofuel raw materials such as soybean oil, rapeseed oil, and palm oil, gutter oil was originally waste, and it has almost zero carbon emissions, making it a very promising green energy source.