MNM Christmas Cookies

Name: MNM Christmas Cookies
Prep time: 600 s
Total time: 600 s
Yield: 18-24 cookies
Ingredients: 1/2 cup softened butter; 1 cup brown sugar; 1/2 cup granulated sugar; 1 egg; 1 1/2 cup flour; 1/2 tsp salt; 1 tsp baking soda; 3/4 cup MNM’s; 1 tbsp vanilla