Chocolate and Hazelnut Roulade with Toasted Hazelnut and Cinnamon Crumble Recipe - Great British Che

Ingredients

• 1 tbsp of sunflower oil, for greasing
• 3 eggs, room temperature
• 125g of caster sugar
• 1 tsp vanilla bean paste
• 45g of unsalted butter, melted and cooled
• 80g of Doves Farm Organic Oat Flour
• 1 tsp xanthan gum
• 1/2 tsp Doves Farm Baking Powder
• 150g of unsalted butter, softened
• 400g of icing sugar, plus more for dusting
• 100g of cocoa powder
• 1 pinch of salt
• 150g of hazelnut creme
• 2 tbsp of whole milk, or more as needed
• 250g of hazelnuts, toasted and chopped
• 75g of brown sugar
• 1 tsp ground cinnamon
• 240g of dark chocolate, chopped
• 360g of double cream