Makes 16 buns
Make the dough the evening before you plan to bake. The next morning, it takes about 45minutes to assemble and knot the buns, followed by 1 hour of rising time before you bake.
The next day, stir together the room temp butter, brown sugar, cardamom, cinnamon and vanilla to make a thick even paste.
Use a tape measure/ruler and a sharp knife to measure and slice the dough vertically into 16 x 2.5cm strips. This is along the long edge, so each strip of dough should be ~30cm long. I lay the ruler along the dough and run my knife down beside it to get a straight line (see photos).