Preheat your oven to 350°F (175°C). This ensures that your cookies bake evenly.
In a large mixing bowl, whisk together the melted butter, granulated sugar, and brown sugar until well combined. Add the egg and vanilla extract, mixing until smooth and creamy.
In a separate bowl, mix together the flour, baking soda, and salt. This helps to evenly disperse the dry ingredients before adding them to the wet mixture.
Gradually add the dry ingredients to the wet ingredients, stirring gently with a rubber spatula until just combined. Be careful not to overmix.
Gently fold in the chocolate chips and sprinkles until evenly distributed throughout the dough.
Using a cookie scoop or a spoon, drop rounded tablespoons of dough onto a parchment-lined baking sheet, spacing them about 2 inches apart.
Bake in the preheated oven for 10-12 minutes, or until the edges are lightly golden but the centers still look soft. Remember, they will continue to cook slightly after being removed from the oven.
Let the cookies cool on the baking sheet for about 5 minutes before transferring them to a wire rack to cool completely. Enjoy your Chocolate Chip Birthday Cookies with a glass of milk or your favorite beverage!
