My "recipe" is simply caiziyou and erjingtiao, hot flash method, and it works well enough.

One thing the author misses about the oil choice: what makes caiziyou superior to other oil choices is that it has a high viscosity. That results in the chili oil sticking to food and the tongue better once used; it probably also affects the fluid dynamics of the frying step in a way, though I can't say if it's significant.