01 -
Toss the blueberries, brown sugar, honey, lemon zest, lemon juice, cinnamon, and nutmeg into your slow cooker. Give it a good stir to blend it all together.
02 -
Put the lid on your slow cooker and set it to high for an hour. This helps soften the blueberries and pulls the juices out.
03 -
Carefully move the hot blueberry mix into a blender and blend it until it's smooth. You might need to split it into smaller batches if your blender is small. Be super careful blending hot stuff!
04 -
Pour the smooth mixture back into the slow cooker. Prop the lid open a little using the handle of a spoon or a chopstick so some steam can escape, which helps it get thicker.
05 -
Let it simmer on low heat for another 4-5 hours. Stir it here and there if you can. When it's thick enough to coat the back of a spoon, it's ready.
06 -
While the mixture is still hot, scoop it into clean 8oz mason jars. Leave about ¼ inch of room at the top of each jar to allow for expansion.
07 -
Let the jars cool completely before sealing them with lids and putting them in the fridge. It'll stay good for up to two months when refrigerated.