Start by taking a piece of butter and cover the base of your saucepan, about halfway up the sides will do. This’ll prevent the milk from burning along the sides while it cooks.
Pour 1 liter of milk in to the saucepan and bring to a light simmer
Meanwhile, add the flour, cubed butter, baking powder and salt to a mixing bowl. Using your fingertips, rub the butter in to the flour, ultimately creating a bread crumb like texture.
By now the milk should be warm and frothy. Lower the heat to a light simmer and gradually sprinkle in the flour-butter mixture, about a 1/4 cup at a time. Using a whisk, mix at a medium speed as you do not want to mix vigorously and reduce the size of the lumps.
Be sure to monitor the heat. You’re looking for large, slow popping bubbles. Allow the melkkos to simmer for a total of 10 minutes or until you’re happy with the consistency.
Once you’re satisfied with the consistency you’re ready to make the sugar and cinnamon sprinkle and serve.