1/4tspof cornstarch mixed with a little bit of cold water
Instructions
Preheat the oven to 350 and grease an 8x8 baking pan.
In a large mixing bowl, whisk egg, vanilla, brown sugar and melted butter until well combined.
Sift in the flour, baking powder, baking soda and salt. Whisk until all incorporated.
Melt the white chocolate in a microwave on half the power, for 30 seconds at a time, stirring after each set.
Whisk the melted white chocolate into the batter until all combined.
Spread the batter evenly in the baking pan and bake for 20 - 25 minutes.
After the blondes have been baking for about 15 minutes, add the nuts and white chocolate.
Raspberry topping: in a small sauce pot, bring raspberries and sugar to boil on medium heat while mashing the raspberries with a wooden spoon. Add the cornstarch mixture, while whisking constantly. Cook for a couple of minutes. Strain through a fine strainer to get rid of the solids. Cool until ready to use.
Cool the bars to room temperature and drizzle with raspberry topping.