Preheat oven to 200 C / Gas mark 6. Lightly grease 12 muffin cups or use paper cases.
Beat cream cheese and butter together until fluffy. Beat in egg, cream and vanilla. Combine the flour, sugar, baking powder and salt. Stir flour mixture into cream cheese mixture until flour is moistened. Fold in chocolate chips. Spoon batter into prepared muffin cups filling them 3/4 full.
Bake in preheated oven until tops are golden, about 20 minutes.