Step 1

Add 1 cup unsalted softened butter into a large mixing bowl along with 1/3 cup granulated sugar, and 1 cup golden brown sugar. Use an electric hand mixer to mix the butter and sugar together until it’s creamed together. This should take about 2-3 minutes

Step 2

Next, add 1 large egg, 1 egg yolk, and 1 teaspoon of vanilla extract. Mix again at high speed for about 1 minute.

Step 3

Now place a fine-mesh sieve over the mixing bowl and add in 2 1/2 cups all-purpose flour (spooned and leveled off), 1 teaspoon baking soda, and 1 teaspoon salt. Sift the dry ingredients in, then mix again with the hand mixer. You will need to mix at low speed so the flour doesn’t go flying everywhere.

Step 4

Lastly, add 3/4 cups semisweet chocolate chips, 1 cup mini marshmallow, 2 bars chopped Hershey's Chocolate (64g), and 
6 crushed Graham crackers squares.

Step 5

Mix everything together using a spatula. Then scoop out the cookie dough using a medium-sized cookie scoop. Place the cookie dough balls onto a baking sheet lined with parchment paper and bake at 350 degrees Fahrenheit for about 9 minutes. TIP: to make the cookies look prettier you can add extra chunks of Hershey's chocolate, crushed graham crackers, and mini marshmallows on top before baking.