I'll be sure to post some of my favourite buttercream recipes, I have white/milk/dark buttercream, peanut butter buttercream, strawberry buttercream (you add jam) and with buttercreams you can add liqueurs. I also bought a truffle scoop which is like the spring loaded release ice cream scoop in truffle size. I use it for everything. Its perfect for mini muffins, cookies, meatballs and so many other things! I wouldn't be without it. Its a size 18/8 and I got it from a catering supply store online. They have every single size. I plan on buying one for every baker I know as they are sooooo handy but you can't buy them anywhere!

ETA: Maybe the liqueur helps them last longer?