As far as I now know, there are two ways to can bananas: puree and chunked. The only thing that everyone seemed to agree with is that you cannot process bananas with water bath canning. A pressure cooker is necessary because they have virtually no acidity.
Chunked
The University of Minnesota recommends cubing and canning just like you would pumpkin. This is due to their belief that straight pureed banana is too thick to insure the center of the jar has reached the appropriate temperature. So you cut it into one inch chunks, boil it in water for 2 minutes and place into cans covered in the cooking liquid. Provide 1 inch of head space and process for 55 minutes at 11 PSI.
Puree
I went with the Univeristy of Georgia's recommendations for fruit puree. Fruit puree was chosen mainly because I am only canning the bananas to use in banana bread. This way, if the processing isn't 100 percent effective I am then going to recook the bananas in the bread at 350 degrees for quite some time. Also if the bananas are already pureed it saves a step later. Due to the amount of discrepancy I wouldn't use this canned banana in baby food or another product you would eat raw right out of the can like, say, applesauce.
Lastly, there are some things that this version of fruit puree won't work for. As stated on the UGA canning website:
Important: These recommendations should not be used with figs, tomatoes, cantaloupe and other melons, papaya, ripe mango or coconut. There are no home canning recommendations available for purees of these products.
After all that, I was feeling fairly confident of the process necessary to can the bananas. Now I just needed to acquire them. Though we don't get a lot of our groceries from Save-A-Lot, they consistently have the lowest price on certain items. Bananas at .33 cents a pound is one of those things. Even more amazing, they sell their bruised or over-ripe bananas for .19 cents a pound! Twenty pounds of bananas later, I was headed home for a day of pureeing.
To make fruit puree for canning, you don't just mash up the fruit. That makes a substance which is way too gooey and dense. Secondly, you cannot water bath can bananas, so you have to have a pressure canner. Lastly, it also helps if you have a compost bin. After peeling that many bananas, I had quite a mound of waste which gladly filled up the compost bin with much helpful potassium!
One odd thing I will let you know is that bananas turn pink when they are canned. I have no idea
In reality it took much, much longer just to find out how I was supposed to can the bananas than it did to actually do the canning. I find this rather ironic, and a little silly. By the end of the whole research process it was no longer about just canning bananas for me. It became necessary for my stubborn self to know just why on earth this had to be so complicated! The results were well worth it, however, when there is chocolate banana bread on the line. With the thirty pints we now have an entire years worth of bananas and all for under 15 dollars!
Chocolate Banana Bread
Ingredients
1/2 cup butter (1 stick)
1 1/2 cups whole wheat flour
1 cup sugar
2 large (3 medium) eggs
1 pint mashed banana (2 cups)
2/3 cup Dutch process unsweetened cocoa
1 Tblspoon baking powder
1 cup chopped pecans
Directions
Grease muffin tins and preheat the oven to 350 degrees. Cream butter, sugar, eggs, and banana till combined. In a separate bowl whisk together flour, baking powder, and cocoa. Add the flour mixture to the banana goo in thirds, mixing thoroughly in between each addition. Fold in pecans. Bake at 350 for 20-25 minutes. To make as bread, bake in 9x5 loaf pan for 60-75 minutes.




