Baking with Waterview Lodge - Jammy Dodger Blondies

Ingredients below video

Ingredients 

175g salted butter plus extra to grease

140g light brown sugar, 

140g golden or white caster sugar

2 medium eggs, 

1 tsp vanilla extract 

225g plain flour, 

25g custard powder (not the instant type)

100g white chocolate chunks or chips, 

55g raspberry jam