Step 1

Start by melting 2 sticks of unsalted butter in a small pan over low heat.

Step 2

While butter is melting, add 3/4 cup packed light brown sugar and 1/2 cup granulated sugar to a medium-sized bowl. Whisk together.

Step 3

Allow butter to cool for 2 minutes before adding it to sugar. Then, whisk together until well-combined.

Step 4

Add 2 large eggs to butter-sugar mix. Then, add 1 teaspoon of vanilla extract and optional black food coloring. Whisk together.

Step 5

In a separate small bowl, measure and pour 2 and 1/4 cups all-purpose flour. Then, add 1.5 teaspoons of corn starch, 1 teaspoon of baking powder and 1 teaspoon of kosher salt to the flour. Mix dry ingredients together.

Step 6

Pour dry ingredients into butter-sugar mix. Stir until a dough forms, and add extra black food coloring if desired.

Step 7

Mix in 1 cup of M&M's and 1 cup of semi-sweet chocolate chips to cookie dough.

Step 8

Next, take one large spoonful of cookie dough and place on a prepared cookie sheet. Add optional Halloween candy to center before adding another spoonful of cookie dough on top. Note: For this recipe, we placed one unwrapped Reese's peanut butter cup upside down to the center. We did this for 6 of the 10 cookies. For the last four, we used 2 broken Kit Kat bars.

Step 9

Make sure sides are covered before patting cookie into a circular shape. Add additional M&M's to the top before continuing.

Step 10

Allow cookie dough to chill in fridge for at least 2 hours. Then, bake at 350ºF for about 20 minutes. Let cool before serving.