Sugar, Brown Sugar, Butter, Baking Soda, Flour, chocolate chips, baking powder, Mini Marshmallows, Eggs, Vanilla Extract, and Salt.
Preheat oven to 350 degrees Fahrenheit.
Beat the butter with both brown sugar and white granulated sugar until smooth.
Add the vanilla extract then the eggs one at a time, continue to scrape the bowl as necessary.
Add the dry ingredients and mix on low speed to combine.
Mix in the chocolate chips and mini marshmallows. Mix just enough until incorporated.
Using a medium cookie scoop begin to scoop cookie dough on to a parchment lined baking sheet, keeping the cookie dough at least 2 inches a part. Add additional chocolate chips and mini marshmallows on top.
Place baking sheets in the refrigerator for at least 30 minutes.
Remove baking sheets from the refrigerator and bake for 10 minutes.
Let cool slightly on the cookie sheet until firm and cool. Enjoy immediately or place in a container.