Combine graham crumbs and butter; press onto bottom of a microwave-safe mug. (spray inside of mug with cooking spray if you want to remove cheesecake after microwaving. ), stir cream cheese with a fork in a small bowl until smooth. (if necessary| microwave it for a few seconds to soften and remove lumps. ) mix in sugar| sour cream and vanilla until blended add egg and mix until fully incorporated. Pour over crumbs. , microwave on medium (50% power) for 1 min. If needed| microwave an additional 20 to 40 sec. Or until edge begins to set| but cheesecake it is still a little wet and shiny in the center. (do not overcook. ) cool for 10 min. Before placing in the fridge for at least 1 to 2 hours or until set.