Step 1: Preheat your oven to 350°F (175°C) and line two large baking sheets with parchment paper for your scary monster cookies recipe.
Step 2: In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
Step 3: Beat in the eggs one at a time, then stir in the vanilla extract for the scary monster cookies recipe base.
Step 4: In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add the dry ingredients to the wet ingredients until just combined.
Step 5: Divide the dough into three bowls. Add a different gel food coloring to each bowl and mix until the desired scary monster cookies recipe hue is achieved.
Step 6: Fold in the chocolate chips equally among the colored doughs.
Step 7: Scoop rounded tablespoons of dough onto the prepared baking sheets, spacing them 2 inches apart.
Step 8: Bake for 9-11 minutes until the edges are set. Remove from the oven and immediately press candy eyeballs into the warm cookies.
Step 9: Allow the scary monster cookies recipe to cool on the pan for 5 minutes before transferring to a wire rack.