Pre heat your oven to 160C Fan/350F/Gas Mark 4, and grease and line a 9" square traybake tin
Melt the butter with the golden caster sugar in a pan on a low heat
Once the butter has melted, take the pan off the heat and add the white chocolate. Leave it for about 5 minutes, then stir together until the white chocolate is fully melted. Don't worry if it looks a bit lumpy or separated
Transfer the mixture to a mixing bowl at this point if you like. Add the eggs and vanilla extract to the mixture, and whisk to combine
Add the plain flour and white chocolate chips, and mix them in, then pour the mixture into the lined tin
Add the jam in small blobs all over the blondie mixture, swirl it around gently using a butter knife. Place the Jammie Dodger biscuits in rows on top of the batter
Bake the blondies for 30-35 minutes, or until they are golden brown all over. Using a skewer inserted in the centre doesn’t give a clear indication that they are done because blondies are meant to be gooey and almost a little under cooked. Blondies are the white chocolate version of brownies and they are not like cake. They will also set more as they cool down
Leave to cool in the tin, then put them in the fridge for a couple of hours. Then remove from the tin and slice
Store in an airtight container in a cool place and eat within 3 days
Video
Notes
You can use either butter or a baking spread for the blondies. I personally prefer butter.
Avoid using cooking or baking chocolate for the blondies, and also I don't recommend using Milky Bar or any white chocolate with low milk solids as they can stop the blondies from setting.
If you don't have golden caster sugar, you can use regular white caster sugar.
I used Callebaut chocolate chips for this recipes, but any bake stable chocolate chips will work.
As Jammie Dodgers are raspberry flavoured, I've used raspberry jam in this recipe. You can swap it for strawberry if you prefer, or any flavour of your choice. I do recommend using a good quality jam.
Although I provide cup measurements, I highly recommend weighing your ingredients out using digital kitchen scales. It is the most accurate way to measure ingredients and will ensure the best results. Digital scales are very low cost and can be purchased for around £12 ($16.50) .
For teaspoon (tsp) and tablespoon (tbsp) measurements, please use measuring spoons and not the type of spoons you eat with. Again this will ensure accuracy and provide the best results.
I updated and improved this recipe in May 2023. If you're looking for the previous version of this recipe using a 9" x 12" tin here it is:
200 g Butter or baking spread
300 g Golden caster sugar or regular caster sugar
150 g White chocolate broken into pieces
3 Eggs large
1 tsp Vanilla extract
225 g Plain flour
12 Jammie Dodger biscuits
6 tbsp Strawberry Jam or other flavour of your choice