Add the honey and egg in a medium heat proof bowl. Mix well.

In a small pan, heat the milk, vanilla extract and rosewater on medium-low for 15 minutes.

Temper the egg and honey with the warm milk by adding 1/4 cup of milk at a time to the egg mixture, whisking constantly. Continue this process until all the milk is used.

Place the liquid into a blender and blitz until frothy. Pour into warm mugs and serve immediately.