Whisk the egg whites to form peaks. Add the sugar, the egg yolks, butter and whisk well to a uniform mixture. Then, grate the sweet potato over milk to avoid oxidation and add to the mixture. Add the milk, the baking powder, the vanilla essence
and keep mixing and adding flour until desired firmness. Put the mixture in a mould previously covered with butter. Pre-heat the oven and bake for 20 minutes at 180°C. Let cool down before serving.


680 g medium sweet potatoes
250 g butter
7 eggs
½ litre of milk
3 ½ cups of sugar
1 tsp of baking powder
6 cups of flour
Half cap of vanilla essence