Start with 1 stick of butter (113 gram). Keep it very cold and cut it into bits - lengthwise into four quarters, then slice across into about 1 cm pieces.
After you've cut up the butter, put it back into the fridge to stay cold (or even into the freezer for a few minutes if your kitchen is hot).
Before you start with your dry mix, get your cream and add-ins ready. Put 1 ¼ cups of heavy cream into a bowl. Add whatever add-ins you plan to use.
