Prepare your pan. Line a baking pan with parchment paper and set aside.
Make the candy coating. In a medium saucepan, add sour cream and sugar. Bring mixture to a boil over medium heat, stirring constantly.
Cook to temperature. Once the mixture comes to a boil, reduce the heat and continue boiling for 6-8 minutes, or until it reaches 240 degrees on a candy thermometer. Stir constantly.
Add the flavoring. Remove the mixture from the heat and stir in the vanilla.
Coat the pecans. Add the pecans and stir well, coating the pecans completely with the mixture.
Spread and cool. Spread the pecans on the parchment-lined baking sheet. Separate the pecans with a fork. Let the pecans cool completely.
Store. Break into pieces before storing in a zip-top bag, an airtight container, or a gift bag.
Notes
Use a candy thermometer to ensure you are reaching 240 degrees. This is the soft-ball stage necessary to get the desired results.
After you spread the pecans on the parchment paper, try to separate the pecans with a fork.
Allow the candy to set for several hours to cool.
While the sugar is still warm, the mixture/pecans will be sticky. After they cool, you can break them into pieces and store them in an airtight container or zipper bag.
Use a variety of nuts such as walnuts, almonds, or cashews.