Start by preheating your oven to 350°F (175°C). Grease and flour a baking pan to prevent sticking.
In a large mixing bowl, beat together the softened butter, granulated sugar, and brown sugar until creamy and smooth.
Add in the eggs one at a time, mixing well after each addition, followed by the vanilla extract.
In another bowl, whisk together the flour, baking soda, and salt. Gradually blend this dry mixture into the wet ingredients, stirring until just combined.
Fold in the chocolate chips until evenly distributed throughout the batter.
Pour the batter into your prepared baking pan, spreading it out evenly. Bake for 20-25 minutes, or until a toothpick comes out clean.
Allow the cake to cool in the pan for a few minutes before transferring it to a wire rack to cool completely.
Once cooled, frost with your favorite frosting or enjoy it plain. This cookie cake is sure to please everyone!
Notes
This cookie cake keeps well for several days in an airtight container — if it lasts that long!