• Preheat oven to 3305F /170C

Cookie Dough

• In a mixing bowl, combine flour (2 cups, 285 grams), baking soda (1 teaspoon), baking powder (1/4 teaspoon) and salt (1/2 teaspoon). Set aside.
• Add granulated sugar (1/2 cup, 100 grams) and brown sugar (3/4 cup, 150 grams) in a mixing bowl.

  Melt 1½ sticks (170 grams) of unsalted butter.

  Pour hot melted butter into a mixing bowl with sugars. Beat the sugars and melted butter with a handheld mixer on medium-high speed for 60 seconds until well combined.

  Then, beat in one whole large egg and one egg yolk. Scrape down the bowl and beat until smooth, about 30 seconds. Allow mixture to rest for 5 minutes.
• Gradually, on low speed or by hand, stir the flour mixture into the rested butter-sugar mixture until combined, about a minute.

  Stir in chocolate disks or chocolate chips, cover, and allow to rest in the fridge for 15 minutes as the oven preheats.

Bake Cookies

• Divide dough onto a baking sheet lined with parchment. Use a cookie scoop to drop even amounts of cookie dough onto a baking sheet, about 2 inches apart.
• Bake cookies in a preheated oven at 335F/170C until lightly golden brown, puffy, soft in the middle, with golden brown edges.

  Transfer cookies onto a cooling rack to cool completely.