1Beat the egg yolks and add salt, sugar and baking powder.
2Once it is well mixed, add the butter, under continuous stirring,.
3Then add the egg whites and whisk to blend.
4Add flour, mix well and pour into a greased mold with butter.
5Place in the oven, pre-heated to 190 ° C, until risen and golden brown.
6Remove from oven and cut in half horizontally.
7Heat the rum over low heat with the lemon juice and two tablespoons of sugar.
8Bathe with this preparation in the cake, filled with jam and return it in its original form.