Preparation Steps

• Preheat oven to 400°F (204°C). Line two baking sheets with parchment paper and set aside.
• Using a stand mixer with the paddle attachment, combine cold butter, brown sugar, and granulated sugar. Beat on medium speed until no visible butter chunks remain and the mixture is creamy.
• Add the egg and egg yolk and mix until combined. Add the vanilla extract and continue mixing, scraping down the sides of the bowl as needed, until combined.
• In a medium bowl, whisk together flour, cake flour, salt, baking powder, and baking soda.
• With the mixer on low, gradually add the flour mixture to the wet ingredients. Mix until mostly incorporated.
• Add the chocolate chips. Mix just until the flour is fully incorporated and the chocolate chips are evenly distributed.
• Shape the dough into 8 large balls.
• Place 4 cookie dough balls onto each lined baking sheet, spacing them out evenly.
• Bake for about 12-13 minutes, or until the edges are golden brown.
• Let the cookies cool on the baking sheet for 10 minutes before transferring to a wire rack.
• Serve warm.