In a mixing bowl, add the melted butter, brown sugar, and granulated sugar and mix until smooth.
Mix in the vanilla and egg until combined.
Add in the flour, salt, and baking soda and mix on medium speed until it combined, scraping down the sides of the bowl as needed. Do not over-mix the batter.
Using a spatula or large spoon gently fold in sprinkles and chocolate chips. You can also do this with your mixer on very low speed.
Roll 2 tablespoon balls of dough and place on a baking sheet lined with parchment paper or silicone baking mat.
Cover with plastic wrap and place in the fridge for 1.5 to 2 hours, or up to 24 hours.
Preheat the oven to 350℉ when ready to bake the cookies.
Place the balls of dough on a baking sheet lined with parchment paper or a silicone baking mat, making sure they are about 2 inches apart to allow for spreading.
Bake for 11-13 minutes until the edges are golden.
Remove from the oven and, if using candy eyes, immediately place them onto the cookies while they are still warm, so they stay in place once cooled,
Enjoy!