Outrageous Triple Chocolate Cookies

Bahan-bahan (12 porsi)

• 60 g / 4 tbsp unsalted butter (, softened)
• 2/3 cups (120g) brown sugar (, tightly packed)
• 2 tsp vanilla extract
• 2 egg yolks (, at room temperature (Note 4 for using leftover whites))
• 2 tbsp glucose ((sub light corn syrup, Note 1))
• 1 cup (150g) flour (, plain/all purpose)
• 1/2 tsp baking powder
• 1/4 cup (30g) cocoa powder (, unsweetened, preferably Dutch processed (Note 2))
• 3/4 cup (150g) white chocolate chips ((Note 3))
• 1/2 cup (100g) dark chocolate chips ((Note 3))