Start with the base: In a large bowl, cream together the softened butter with the brown and white sugars. Don't rush this part—really beat them until the mixture is light and fluffy. This is where the magic happens and creates that perfect texture!
Add the liquids: Mix in the egg, that extra egg yolk, and the pure vanilla extract. Keep beating until everything is smooth and well-combined.
Bring it together: Gradually fold in your flour, baking soda, and salt. Gently mix it all together just until the flour streaks disappear. Take care not to overmix here; we want tender cookies, not tough ones!
The chocolate love: Gently fold in those chocolate chips. I like to make sure they're evenly distributed throughout the dough.
Patience is key: Cover your bowl and pop the dough in the fridge for at least 1 hour. I know it’s hard to wait, but this chilling time is the real secret to bakery-style cookies that don't spread too much.
Get ready to bake: Preheat your oven to 350°F (175°C). Scoop the dough into rounded balls and place them on your parchment-lined baking sheet, giving them a little room to breathe.
The golden touch: Bake for 10–12 minutes. You want the edges to look set and golden, while the centers might still look a bit soft—that’s exactly how you keep them chewy.
