This is a recipe that will allow your sim to craft a block of butter from my Preserving Shelf or the Brazen Homestead Craftbooks. Once created, that block will need to set for 6 hours before butter can be collected from it. Once collected, that butter can then be used as an ingredient in other recipes. If you have my 'Buttermilk' ingredient installed then you will also get a bottle of Buttermilk!
With this mod, Sims that aren't gluttons will stop eating as soon as they are fed up - just like it was in the Sims 2. I recommend to use the grandmeal module in combination with my moregrandmeals_tradionstweak. Otherwise, your Sims will not fulfill the grand meal tradition when they don't finish their plates.