01 -
Rinse and drain the cranberries, removing any stems or damaged fruit. Zest the orange using a fine grater and juice it until you have the required amount.
02 -
Add cranberries, granulated sugar, brown sugar, orange juice, orange zest, water, vanilla extract, ground cinnamon, and salt to the slow cooker. Stir thoroughly to combine.
03 -
Set the slow cooker to LOW and cook uncovered for 4 hours. Stir once or twice during cooking to promote even breaking down of the cranberries and uniform texture.
04 -
When the cranberries have burst and the sauce thickened, taste and adjust sweetness or tartness as desired by adding sugar, salt, or orange juice. Optionally mash some cranberries for a smoother consistency or leave some whole for texture contrast.
05 -
Allow the sauce to cool to room temperature where it will thicken further. Serve immediately or refrigerate in airtight containers for up to one week.