Sims will directly change into their winterwear when heading to go sledding togehter instead of first running there with whatever they wear at the moment. Moreover, Sims will change into their winterwear when you choose the regular or goofy pose at the snowsportsslope.
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!