In a small mixing bowl, combine softened cream cheese and granulated sugar. Blend on medium speed for 2–3 minutes until creamy and smooth.

Add sour cream and vanilla extract to the mixture and blend for another 1–2 minutes until fully combined.

Wash the red and green grapes under cool water, then pat them dry with a kitchen towel.

In a large mixing bowl, pour the washed grapes and spoon the creamy dressing over them. Toss gently to coat the grapes.

Fold in the chopped pecans gently into the grape mixture.

Transfer the salad to a serving bowl and sprinkle brown sugar on top.

Cover the bowl tightly and refrigerate for at least 1 hour before serving.

Give the salad a gentle stir before serving.