These Marshmallow Cookies are the perfect blend of soft, chewy goodness. They have a crispy edge and a soft, gooey center. They're perfect with a glass of cold milk, or even to share!
Step 1: Preheat the oven to 350 °F and line a baking sheet with parchment paper.
Step 2: In a medium bowl, whisk together the flour, baking soda, and salt.
Step 3: In a separate large bowl, cream together the butter, granulated sugar, and brown sugar until light and fluffy. Add in the egg and vanilla extract and beat until well combined.