Ingredients
Method
- Melt butter and mix with sugars until smooth.
- Chill mixture for 10 minutes.
- Mix in egg, egg yolk, and vanilla.
- Add flour, oats, baking soda, salt, and cinnamon.
- Fold in chocolate chips.
- Roll into balls and chill 30 minutes.
- Bake at 325°F for 12–14 minutes.
Notes
Chilling is key for thick, chewy cookies. Slightly underbake for the best soft centers—they’ll set as they cool.