First of all, bring the grapes and wash them under a tap running water. Make them clean and stem-free. Set them aside.
Bring a mixing bowl of suitable size and then you must add the sour cream into this bowl. Add sugar with the cream and mix well to dissolve sugar in the cream.
Bring the cream cheese which was kept at room temperature and slice it into cubes. Put the cream cheese cubes into the food processor and process them at high speed.
Once the cream cheese is blended and gets smooth enough, pour it into the sour cream mix.
Take an electric beater and beat the mixture to make it enough fluffy and smooth. Bring the vanilla and pour it into the bowl. Mix again. Bring the grapes and put all of them in a large bowl. Pour the prepared dressing into the grapes slowly and make folding out of it.
Mix well until all the grapes are well coated with the dressing and put the bowl in the refrigerator while covered from the top.
Serve the chilled grape salad and have fun.