In a bowl, whisk together the flour, milk, sugar, cocoa, oil, salt and vanilla until fully combined. Pour into a 12-ounce mug and top with the chocolate chips.
Microwave on high power for 1 1/2 to 2 minutes, depending on how gooey you like your cake. Carefully remove from the microwave and let cool slightly. Top with whipped cream and serve.
Recipe courtesy of Trisha Yearwood