S'mores Cookies

I found this recipe online and thought we'd try it out for birthday treats for Aiden to take to preschool. They are so good, that I don't want to send them with him, but it's better to share than to eat that many cookies, I suppose. This recipe is going into my recipe box. Need I say more?

Ingredients

• 2 1/8 c. all-purpose flour (~ 10 1/2 ounces) 
• 1/2 t. salt 
• 1/2 t. baking soda 
• 12 T. butter (1 1/2 sticks), melted and cooled slightly
• 2 T. butter (1 1/2 sticks), melted and cooled slightly 
• 1 c. brown sugar  (7 ounces) 
• 1/2 c. sugar (3 1/2 ounces) 
• 1 egg 
• 1 egg yolk 
• 2 t. vanilla extract 
• 1 - 2 c. chocolate chips or chunks (semi or bittersweet)
• 1/2 bag of mini marshmallows
• 1 box graham crackers
• 3 Hersey bars broken into the pieces

Directions

1. Adjust oven racks to upper- and lower-middle positions.  Heat oven to 325 degrees.
2. Mix flour, salt, and baking soda together in medium bowl; set aside.
3. By hand, mix butter and sugars until thoroughly blended.
4. Mix in egg, yolk, and vanilla.
5. Add dry ingredients; mix until just combined.
6. Stir in chocolate chips and marshmallows. 
7. Place about 1 1/2 T. of dough on graham crackers squares. Press down slightly with fingertips.
8. Bake for 5 minutes then remove from oven to press Hershey’s bar pieces on to the top. You can place as many pieces or as little as you want depending how much chocolate flavor you want.
9. Bake for 7-10 more minutes or until dough is beginning to turn golden brown at the edges.  Do NOT over bake!
10. Allow cookies to cool on cookie sheet for 5 minutes, then move to a cooling rack.