First up; preheat your oven to 190°C/170°C/Gas Mark 5. Grease and line a 32x20cm rectangle baking tin. Melt the butter in a pan over a low heat, once it starts to bubble remove from the heat and pop in the White Chocolate and sugars. Stir until the chocolate has melted, if needed place the pan back over a very low heat and stir until the chocolate has melted. – if the mixture looks like it is beginning to separate don’t worry it’ll come back together once you add the eggs. 

Pour the chocolate mixture into a bowl and leave to cool for 5 minutes. Add the eggs and Vanilla Extract and whisk the mixture on a high speed for 2-3 minutes – this will help create the smooth shiny top on your blondie. It is easiest to do this step using a hand whisk or freestanding mixer with the whisk attachment. Stir through the baileys and then fold in the flour until just combined. Add the chopped hazelnuts and mix into the blondie mixture along with the Chocolate Chunks. Pour the mixture into the prepared baking tin and smooth the top. 

Mix the caramel and baileys together until smooth. Dollop half the caramel over the top of the blondie and swirl through a with a cocktail stick or knife. Pop in the oven and bake for 45-50 minutes until golden brown on top, the edge of the blondie should be set and the centre slightly wobbly, this will firm up as the blondie cools. Leave to cool in the tin for 30 minutes and then pop onto a cooling rack to cool completely. 

Once your blondie is cooled it’s time to make the icing, pop your butter into a large bowl and whisk using an electric hand mixer until smooth and glossy. Gradually whisk in your icing sugar until all combined. Pour in your Vanilla Extract and baileys and whisk together until you have a smooth light icing.

Smooth your icing over the top of your blondie using a palette knife or spoon. Drizzle over your left over baileys caramel. You can also top with a few chopped hazelnuts and chocolate shavings.

You are ready to slice up your blondie and box up for the ultimate indulgent Christmas treat!