Yeah, in researching recipes, they’re about 50/50 for and against adding fat. The hardliners say never to add fat as it’s unnecessary, but others say add some lard or butter to increase the pliability. The ones I made are still fairly pliable, they have a crackly surface but don’t actually crack or tear when folded.
For Brussel sprouts try this recipe, they’re awesome
Bressel sprouts that don’t suck