"My favorite way to eat a chocolate chip cookie - when it's the size of a cake! Soft and rich in the center and extra chewy on the edges. Decorate with frosting, slice, and serve. Yield: one 9-inch cake..."
INGREDIENTS
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* 3/4 cup (170g) unsalted butter, softened to room temperature * 1 cup (200g) light brown sugar * 1 large egg + 1 egg yolk* * 2 teaspoons vanilla extract * 2 cups (250g) all-purpose flour (careful not to overmeasure) * 2 teaspoons cornstarch&nbs