Squeeze oranges and measure 1/4 l juice. Mix pudding powder and 40 g sugar and stir with 100 ml orange juice until smooth
Bring all the orange juice to the boil. Stir in pudding powder, bring to the boil. Simmer for about 1 minute. Leave to cool slightly and pour into 4 large glasses or a bowl. Keep cool for at least 3 hours
Mix crème fraîche, 20 g sugar and vanillin sugar until smooth. Whip cream until stiff and fold in. Just before serving, pour onto the pudding