Kue Kacang Macadamia Coklat Putih

Bahan-bahan (13 porsi)

• 175 g / 5.5 oz butter, unsalted, softened ((11 US tbsp))
• 1/3 cup brown sugar
• 1/3 cup white sugar (, caster/superfine best)
• 1/8 tsp salt
• 2 egg yolks ((Note 6 for using leftover whites))
• 2 tsp vanilla extract/essence
• 1 1/2 cups flour (, plain/all purpose)
• 1/2 cup rice flour (sub with plain) ((Note 1))
• 1/2 tsp baking powder
• 100 g / 3.5 oz macadamias (, roughly chopped (Note 2))
• 125 g / 4 oz white eating chocolate (, chopped into pretty small pieces (not baking chocolate, Note 3))