Cake with potato flour and bitter almonds

Description
In Romanian: Chec cu faina de cartofi si migdale amare

Ingredients

 * 8 oz / 250 g butter
 * 8 oz / 250 g confectioner's sugar
 * 5 eggs
 * 8 oz / 250 g potato flour
 * 4 oz / 100 g blanched, peeled and ground bitter almonds
 * 1 teaspoon vanilla
 * butter and flour to grease and dust the pan

Directions

 * 1) Cream the butter and Sugar, then add the yolks one by one, vanilla and almonds, mixing well.
 * 2) Then gradually add the flour (like a rain) without stopping the mixing.
 * 3) At the end, add the whipped egg whites.
 * 4) Bake in a previously greased and dusted bread pan at medium heat.
 * 5) Test with a wooden pick. When cold, cut into thin slices.