Geode Cake

Name: Geode Cake
Prep time: 1 h 30 min
Cook time: 4 h
Total time: 4 h
Yield: 24 portion
Ingredients: 500 g sugar; 2 tbsp glucose syrup; 4 points of a knife food colouring; 2140 g water; 60 g vinegar; 400 g butter; 400 g sugar; ½ tsp salt; 1 tbsp natural vanilla extract; 6 eggs; 75 g unsweetened cocoa powder; 1 tbsp baking powder; 350 g cake flour; 450 g mascarpone cheese; 450 g whipping cream; 150 g caster sugar; 500 g ripe mango flesh; 2 tbsp chocolate chips; 750 - 1000 g fondant; icing sugar; 2 - 3 points of a knife food colouring