Preheat oven to 350°F. Spray a 13x9-inch baking pan with baking spray and set aside.
Put chocolate in a microwavable bowl and microwave in 30 second increments, stirring in between, until melted. Set aside to cool.
In a medium bowl, whisk flour, baking soda and salt.
In a large bowl, add eggs, sugar, water, and oil and beat until combined. Gradually add flour mixture, beating on low, until combined. Stir in melted chocolate.
Pour batter into prepared baking pan. Sprinkle chocolate chips over the top. Bake for 30 to 35 minutes, or until a toothpick inserted in the center comes out clean. Move pan to a wire rack to cool completely.
Recipe by Alida's Kitchen at https://www.alidaskitchen.com/2014/04/22/chocolate-picnic-cake/