1. Add the milk to melted butter.
2. Mix sugar and yeast with 100ml of milk and butter mixture (leave for 5 minutes).
3. Add salt to sifted flour.
4. First, add the yeast mixture to flour and salt, add the rest of milk and butter mixture.
5. Use Kenwood and knead it for 10min.
6. Put the dough under glad wrap and let it rest for 1½ hour.
7. Divide it into two pieces.
8. Roll each piece in a 70cm long sausage shape.
9. Plait the Zopf and let it rest for 30 minutes.
10. Brush with egg yolk (mixed with a little milk).
11. Bake at 200 degrees Celsius (400 degrees Fahrenheit) for 35 minutes.

An interesting fact about Zopf Plait Swiss Bread:

The Swiss have long been known for their egg- and dairy-rich bread, as well as their intricately shaped loaves. Zopf, usually formed into a simple three-strand braid, is a basic example of this Swiss art. A staple on weekends, and traditionally offered at New Year.