A giant chocolate chip cookie cake frosted and decorated is a fun, family birthday celebration alternative to traditional cake. This crowd-pleasing dessert delivers classic cookie flavor in a shareable form.
Preheat the oven to 350°F and line a 9-inch round cake pan with parchment paper, lightly greasing the sides to prevent sticking.
In a medium bowl, whisk together all-purpose flour, baking soda, and salt for even leavening and flavor distribution.
In a large bowl, beat the unsalted butter, packed brown sugar, and granulated sugar together on medium-high speed until light and fluffy—about 2-3 minutes.
Beat in the eggs one at a time, mixing well after each addition, then add the vanilla extract; scrape down the bowl to ensure even mixing.
Gradually fold the dry ingredients into the wet base on low speed to avoid overmixing; once mostly combined, use a spatula to gently stir in the chocolate chips until just distributed.
Spread the dough evenly into the prepared pan, smoothing the top for even baking; bake on the center rack for 22–28 minutes, just until the edges are golden and a toothpick comes out with a few moist crumbs.
Cool the cookie cake completely on a wire rack in the pan before removing; frost and decorate as desired once fully cooled for best texture.