Mix well to combine and the sugar is no longer light in color.
Place the lid on, set it on high, and cook for two hours.
Cook it on high for one more hour without the lid, and stir it frequently.
Image credits: The Magical Slow Cooker via YouTube
Transfer it to an airtight container and consume it within two weeks.
(it’s possible for you to keep it longer if stored in a freezer.)
Slow Cooker Blueberry Butter Recipe
