Preheat & Prepare:

• Preheat the oven to 350°F (175°C).
• Grease or line a 9-inch round cake pan with parchment paper.

2. Make the Dough:

• In a large mixing bowl, cream together butter, brown sugar, and granulated sugar until smooth and fluffy.
• Add eggs one at a time, mixing well after each addition.
• Stir in vanilla extract.
• In a separate bowl, whisk together flour, baking soda, and salt.
• Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
• Fold in chocolate chips and chocolate chunks (if using).

3. Bake the Cookie Cake:

• Spread the cookie dough evenly into the prepared pan.
• Bake for 22-26 minutes, or until the edges are golden brown and a toothpick inserted in the center comes out clean or with a few moist crumbs.
• Let cool completely in the pan before decorating.

4. Decorate & Serve:

• Pipe frosting around the edges and top with sprinkles, if desired.
• Slice and serve!