4- to 6-quart slow cooker with nonstick cooking spray or a thin layer of butter to help prevent sticking and make cleanup easier.
Pour the frozen wild blueberries straight from the bag into the bottom of the slow cooker and spread them into an even layer. Do not thaw the berries first; they should be frozen when they go in.
Sprinkle the granulated sugar evenly over the frozen blueberries. This helps the berries get extra jammy and sweet as
