Preheat your oven to 180C/160C Fan, and grease & line a 9x9inch Square Tin – leave to the side.
Melt the Butter carefully in the microwave, stir till smooth. Leave to the side for now!
Using an electric whisk/stand mixer, whisk together the Eggs, Caster Sugar and Vanilla together for a few minutes until the colour has turned pale, is very mousse like, and is double the original volume of the amount of eggs + sugar! You will know its done because when you lift the whisk up out of the mix it should leave a trail for a couple of seconds before disappearing!
Whilst whisking, beat in the melted butter a little at a time, making sure each spoonful of butter is fully mixed in before adding a bit more!
Once mixed in, sift in the Plain Flour, and fold the mixture together. Add in the Chocolate Chips, Raspberries and freeze dried Raspberries, and fold again.
Pour the mixture into the tin, and bake in the oven for 35-40 minutes or till baked through. Leave the Blondies to cool in the tin completely.
Drizzle over the melted chocolate, and sprinkle on the freeze dried raspberries (or some more fresh raspberries if you prefer) – leave the chocolate to set and then cut into your portions.