Use this butter extruder to apply butter at a controlled rate to any food! I use it for corn) Put the butter in, and assemble the extruder plunger. Make sure you get all of the plastic off so you don't eat it. Only use the food safe extrusion plastic. (all plastic from makerbot is food safe). Maybe think of other things to extrude as well! Let me know if the model has problems for you. I will fix it if so.