Orange wash, peel and grate on a grater, squeeze the juice. Beat butter with sugar. One driving eggs, continue to beat. Then pour the sifted flour, baking powder, vanilla. Whisk the batter, it should be like a thick cream. Then slowly add to the batter juice and orange zest, mix well. The prepared dough is put into molds and bake at 180 degrees for 20-25 minutes. Bon appetit!