To start, soften the cream cheese. You can take it out an hour before or place the sealed package in a bowl of warm water and it'll be ready in 10 minutes.
In a large bowl, grab a hand mixer and cream together the cream cheese and sour cream. Add in granulated sugar and beat a little more. Then, pour in vanilla extract and beat until everything is well combined.
Allow the dressing to sit for a little while you wash and dry your grapes.
Once that is finished in a bowl add grapes into the dressing. Mix well. Then, toss in 1/4 cup of chopped pecans, 2 tablespoons of brown sugar and fold them into the grape salad.
Lastly, garnish with the remaining brown sugar and chopped pecans and serve.