Double Chocolate Snack Cake

Name: Double Chocolate Snack Cake
Ingredients: 3/4 cup all-purpose flour; 1/2 cup brown sugar, packed; 2 tablespoons unsweetened baking cocoa; 1/2 teaspoon baking soda; 1/2 teaspoon salt; 1/2 cup water, room temperature; 3 tablespoons canola oil; 1/2 teaspoon white vinegar; 1/4 teaspoon vanilla; 1/4 cup semisweet chocolate chips; confectioner's sugar, to taste