INGREDIENTS 1 boxed brownie mix, baked according to package directions (I used Ghirardelli Double Chocolate!)* 3/4 cup unsalted butter, softened 1 cup brown sugar 1/4 cup granulated sugar 1 egg 2 teaspoon vanilla extract 2 cups all purpose flour 2 teaspoon cornstarch 1 teaspoon baking soda 1 teaspoon salt 1 cup bittersweet chocolate chips INSTRUCTIONS https://bromabakery.com/brownie-stuffed-chocolate-chip-cookies/
