Ingredients
Method
- Whisk dry ingredients: flour, baking soda, cornstarch, and salt.
- Mix melted butter, sugars, egg, yolk, and vanilla until smooth.
- Combine dry and wet, then fold in chocolate chips and M&Ms.
- Refrigerate dough for 30 minutes.
- Preheat oven to 350°F (177°C). Scoop dough onto baking sheets and bake 10-12 minutes.
- Cool cookies on wire racks before serving.
Notes
Chill the dough for better flavor and texture.
