Melt the butter in the milk and add the egg yolks, salt, honey, and vanilla extract.
Add the flour as well.
Next, beat the egg whites with the sugar and fold in the remaining batter.
Pour the mixture into a 17 cm (7-inch) diameter cake tin and place it in a pan of water.
Bake at 280°F (140°C) for 15 minutes, then at 300°F (150°C) for another 50 minutes.
