Slime Filled Halloween Cookies

Directions

1. Set your oven to 350°F.
2. Cover a cookie sheet with parchment paper or a non-stick silicone baking mat.
3. Sort the M&M's by color (green, orange, purple) into a small bowl.
4. In a mixing bowl, whisk together the flour, baking soda, salt, and cocoa powder.
5. In another bowl, beat the butter, sugar, and brown sugar with an electric mixer until creamy.
6. Add the eggs and vanilla to the butter mixture and continue mixing.
7. Gradually add the dry ingredients to the wet mixture, stirring until fully combined.
8. Stir about half of the M&M's into the cookie dough.
9. Shape the dough into balls roughly 2 inches in size.
10. Press the remaining M&M's into the top of each dough ball.
11. Bake for 9 to 11 minutes. Let the cookies cool on the sheet for a few minutes, then move them to a wire rack to cool completely.
12. Put the frosting in a microwave-safe bowl and heat for 15 seconds to soften it.
13. Mix in a few drops of green gel food coloring until the frosting turns bright green.
14. Insert the needle of a flavor injector into the frosting and pull the plunger up to fill it.
15. Poke the side of a cookie with the injector and squeeze in frosting until the top of the cookie cracks.
16. Repeat the injection process for all cookies.