Separate the whites from the yolks. We start whipping the proteins with a mixer until the foam. Slowly, one spoonful add sugar, whisk until a white, dense mass.
Whisk the yolks slightly with a whisk and add a spoonful to the protein mass while continuing to whisk.
Sift the flour with vanilla, gently kneading the mass with a spoon in the direction from the bottom up.
Grease the baking dish with oil, pour the dough into the oven preheated to 200 degrees for 25 minutes. Cool the biscuit slightly, turn it over to the wire rack.
For cream first mix the yolk with water, and then add the condensed milk. Then we put the mixture on a quiet fire and cook, like an English cream, to achieve condensation, you can use a water bath. We cool the boiled syrup and add it to the pre-whipped vanilla.
Cut the biscuit into 3 layers, grease each layer with cream, decorate as you like best.