It is difficult to prepare brioche in small quantities. Hence the present recipe will yield more than is needed. The baked brioche can easily be stored in the freezer.
Place all of the ingredients except for the butter in the bowl of an electric mixer. Mix slowly, but thoroughly, using the dough hook.
Add the butter pieces a few at a time and mix in slowly on low speed. This should take about 20 minutes, and the dough should be hanging onto the dough hook.