Prepare the butter cake. Mix the milk with vegetable oil to boil, remove from heat and allow to cool.

Beat eggs in a bowl with the vanilla sugar. Continuing to whisk, add small portions of powdered sugar until the mixture acquires a light yellow color.

Sift flour with salt. Half flour and half milk and butter add to egg mixture, stir gently. Add baking powder, remaining flour and milk. Mix thoroughly to avoid lumps, until the condition of the soft, frothy mass.

Preheat the oven to 180 degrees. C. Baking sheet cover with a sheet of parchment paper, moistened with water, pour it on the biscuit dough.

Bake 30 min. Remove from oven, allow to cool.

Cut from the short side of the biscuit, a piece of such width that of the remaining get a square - this narrow piece will be the "body" of the butterfly. Square piece cut diagonally into 2 identical triangles. Cut off from a right angle on each triangle with sides 4 see In this place "wings" of the butterfly will be connected to "body". On the opposite side "wings" cut out small pieces of triangular shape.

To give the cake the shape of a butterfly. Cream whisk until stable foam, you can add a top coat of cream. To coat the cake from all sides with whipped cream.