Soften the cream cheese in the microwave for 20 seconds.
In a bowl, mix the cream cheese, sugar, egg, milk, and vanilla extract together well.
Strain the mixture through a sieve to make it smooth.
Pour the batter into a mug or a microwave-safe container.
Microwave for 2 minutes at 700W.
Remove, cool completely, then refrigerate for at least 30 minutes.