In one bowl, combine 10 g chia seeds, 1/2 packet vanilla sugar, and 1 tablespoon coconut flakes for the white pudding. In a second bowl, combine 10 g chia seeds, 1/2 packet vanilla sugar, 1 tablespoon coconut flakes, and 1 heaped teaspoon baking cocoa for the black pudding.
In a measuring cup, mix 100 ml coconut milk with 100 ml water. Pour 100 ml into each bowl and stir well.
Cover both bowls with cling film and refrigerate for 20 hours until the chia seeds swell and form firm puddings.
Alternately layer the white and black puddings in a dessert glass, add fruit if desired, and serve.