Ingredients
Method
- Preheat the oven to 350 F. In a medium bowl, whisk together flour, salt, and baking soda. In a large bowl, combine butter with sugar until fluffy. Add in the egg and vanilla extract, and mix until smooth.
- Add in the flour mixture, mix until it is fully combined. Evenly press the cookie dough into a greased 8-inch square baking dish. Top with the chocolate chips and marshmallows. Bake for 20-25 minutes.