Chocolate Cheesecake with a Peanut Butter Cake Crust

Name: Chocolate Cheesecake with a Peanut Butter Cake Crust
Cuisine: American
Ingredients: 50g (¼ cup) peanut butter; 50g (¼ cup) butter (softened); 4 tbsp brown sugar; 1 egg (medium); 1 tsp vanilla; 80g (½ cup) gluten free flour blend (see note 1); ½ tsp baking soda; 100g (3½ oz) Greek yoghurt; 300g (1⅓ cups) cream cheese; 150g (1½ cups) icing (powdered) sugar; 200g (7 oz) good quality dark chocolate; 400g (14 oz) dulce de leche (one can in the UK/Sweden); 20g (2 tbs) icing sugar; 100g (3½ oz) salted peanuts