Well i used a blender instead of a food processor and it worked fine. also my buddy just used his fatty hand grinder to make the butter and it also came out fine.
I made some amazing canna butter recently following a recipe on here (the one where u use a crock pot.) i used 1/2 oz of k2 and my plastic hand grinder. strained thru cheesecloth and came out beautiful
I've made cannabutter twice and did not use a blender or food processor either time. All you need is a crockpot and cheese cloth. I just threw the buds and leaves in the crockpot without breaking them up much, then strained it through the cheese cloth after a few hours.
The THC binds with the fat during the simmering process. the better it binds the more potent the butter. real butter has the best fat content.. Boiling it for 20 minutes isn't the best way to make it. a long slow simmering time makes for the more potent butter. Thats why I say cook with a crock pot at least 18 hours on low.