Skillet Cookie Cake - Easy and Delicious!

Ingredients

• 6 Tablespoons (84 g) unsalted butter, room temperature and very soft
• 1/3 cup (70 g) packed brown sugar
• 1/3 cup (78 g) white sugar
• 1 egg
• 1 teaspoon (4 g) vanilla
• 1 cup (140 g) all-purpose flour
• 1/2 teaspoon (3 g) baking soda
• 1/2 teaspoon (2 g) Kosher salt
• 1/2 cup (88 g) semi-sweet chocolate chips
• 1/2 cup (88 g) white chocolate chips