You will need the following ingredients:

1 ? c cake flour
1 t baking powder
1 c sugar
1/3 c cold water
8 pcs. egg whites
1 t lemon extract

Cooking Procedure Is As Follows:

Beat eggwhites until fluffy adding sugar gradually. Beat eggyolk and add sugar. Add the batter mixture. Fold in the batter mixture to the beaten eggwhites. Pour mixture to greased pan and bake