Place the butter in a medium size bowl. Optional: sift first. Add in flour, sugar and salt (if using unsalted butter) and any flavors. Using your hands or wooden spoon- but i really recommend hands- work butter into the flour/sugar, breaking it into small pieces. Initially the dough may seem too dry, but continue to work it together with your hands and it will come together into a nice soft ball of dough. If making the piped version, mix in the cream.