I only found one place that gave details on how to make blueberry juice, but I modified half the steps so here goes.
1. Rinse and clean the berries. These needed complete cleaning, removing the unripe berries, leaves and twigs. Plus they were frozen. The berries then went into a pot with enough water to just cover the berries. Bring to a slow boil, mash the berries, then bring back to a boil and remove the pot from the heat. I used a small strainer to catch an occasional twig or unripe berry I missed as it boiled to the top of the pot. Cool the juice down. This was very helpful for the next step.
2. Pour the juice and berries into a jelly bag. Collect the juice in another container. Since I was doing multiple batches, I actually used my canner for the juice. I had a lot of juice! When it is cool enough to handle squeeze the bag to get all the juice out of the berries. You might consider wearing gloves, as I did after my first batch. As you know blueberries stain. LOL. What is left in the bag (mushy pulp) put in your compost container.
3. These blueberries are sweet (not acidic), so I felt it was important to use caution and I decided to pressure can my jars.I also decided to not add additional sweeteners at this point. I added the juice quart jars. I pressure canned them at 10# of pressure for 10 mins.
While I personally haven't made jelly, I find my jelly strainer bag indispensable. I have used it when separating my milk kefir and today for juicing.. I also have spare bags, which is great. After today my first bag is stained blue. Also, the Presto 23 quart pressure canner is a good deal if you are just starting out canning. If you like learning vintage skills like this blueberry juice, we would lov to have you join our community t Perky Prepping Gramma on Facebook.
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Even on regular Amazon (not prime), on specific items, when your order reaches a certain point, I believe it's $35 the shipping to home is free. So, i created a store of these items I use frequently or recommend. It doesn't cost you anything extra, but I do receive a small percentage as an advertising bonus, if you purchase from my store. You are even able to just link in and do any of your regular Amazon shopping.