Preheat oven to 175 degrees. Put the butter and sugar in a large bowl and stir until until the mixture will take the white shade and will not air.

In the mixture add half the flour, 3 eggs and mix well. The resulting mass is put in shape, covered with parchment.

Bake for 30 minutes. If you pierce the pie with a knife, and won't have the dough, the pie can be removed from the oven. Hot cake, place on a wire rack (or wooden Board) and let it cool. Variations : Lemon cake. To the batter add the zest of one and juice of two lemons. Spoon the mixture into a baking pan. Chocolate pie. In the dough, add two tablespoons of cocoa and bake.