Preheat your oven to 350°F (175°C) and prepare a round baking pan by greasing it or lining it with parchment paper.

In a medium bowl, whisk together the all-purpose flour, baking soda, and salt until combined and set aside.

In a large mixing bowl, beat the softened unsalted butter, granulated sugar, and brown sugar until light and fluffy.

Add the large egg and vanilla extract to the mixture, beating until fully incorporated.

Gradually mix the dry ingredient mixture into the wet ingredients until just combined, being careful not to overmix.

Gently fold in the chocolate chips and half of the Halloween sprinkles using a spatula.

Pour the batter into the prepared baking pan and bake for 25-30 minutes until golden brown and a toothpick comes out clean.

Remove from the oven, cool in the pan for 10 minutes, then transfer to a wire rack to cool completely. Serve as is or with frosting and sprinkles.