Chocolate salted caramel waffle bread butter pudding

Name: Chocolate & salted caramel waffle bread & butter pudding
Ingredients: 150g dark chocolate (at least 70% cocoa solids); 300ml double cream; 200ml milk; 50g butter; 1 tbsp caster sugar; pinch of ground cinnamon; 1 tsp vanilla extract; 200g canned caramel or dulce de leche; 10 cooked waffles (we used toaster waffles); 4 medium egg yolks, beaten (freeze the whites for another recipe); icing sugar, for dusting (optional)