Preheat your oven to 350°F (175°C) and line the bottom of an 11-inch springform pan with parchment paper.

In a large mixing bowl, whisk together flour, cornstarch, baking soda, and salt.

In a stand mixer, cream together butter, light brown sugar, and granulated sugar until light and fluffy.

Incorporate egg and vanilla extract, mixing until combined.

Gradually add dry ingredients, mixing just until incorporated, then fold in chocolate chips.

Scoop dough into prepared pan and press evenly. Bake for 15-17 minutes or until edges turn golden.

Remove from oven and let cool completely on a wire rack.

Prepare the frosting by beating together softened butter, powdered sugar, heavy cream, and vanilla extract until fluffy.

Once cake is cool, spread the frosting evenly on top and decorate as desired.

Slice and serve the cake, optionally with vanilla ice cream or chocolate sauce.