Ingredients
Method
- Melt the butter, then whisk in both sugars until combined. Let cool slightly.
- Beat in the egg, egg yolk, and vanilla until smooth and glossy.
- Fold in the flour, baking soda, salt, and chocolate chunks. Cover and chill the dough for at least 1 hour.
- Preheat oven to 350°F. Scoop dough onto lined sheets and bake 10 to 12 minutes until edges are golden and centers look underdone.
- Cool on the sheet for 5 minutes, then transfer to a wire rack. Serve warm.
Notes
Chilling the dough is key for thick, soft cookies. The 1-hour chill is not included in the prep time. For make-ahead, refrigerate the dough up to 24 hours. Bake times vary by oven, the centers should look slightly wet when you pull them out. Let the cookies rest on the hot sheet to finish setting.
