Prepare a batter from eggs, sugar, oil, Fanta, flour and baking powder. Bake at 180 ° C (top / bottom heat, convection: 160 ° C) on a tray for approx. 25 minutes. Cover the cooled base with the drained mandarins.
Whip the cream with the cream stiffener and vanilla sugar until stiff, fold in the sour cream and distribute the mixture on the cake with the mandarins. Mix the cinnamon and sugar and sprinkle the cake with them.