This dough is similar to both brioche and croissant doughs, and is actually a combination of the two. The recipe is freely adapted from Wiener Süss-speisen (Viennese Sweets) by Eduard Mayer.
For the dough, in a small saucepan over a low flame, heat the milk just until it feels warm, about 110 degrees. Pour it into a small bowl, and whisk in the yeast. Set aside.
Place the dry ingredients in the bowl of a food processor fitted with a metal blade; pulse several times just to combine. Add the 4 tablespoons of butter and pulse 6 or 8 times, until the b