Buy any butter on sale. Cheaper butter requires more shaking but the results are the same.
Heat jars in 250 degree oven for 20 minutes without seals or lids. One pound of butter will fill one pint jar with a little leftover. 11 lbs = 12 jars.
While jars are heating, start on your butter.
Melt all butter until it comes to a slow boil. Use a spatula to stir bottom so the butter will not burn. Once it comes to a boil reduce heat and let it simmer for 5 minutes.
When jars and butter are done, you will then pour the butter into the jars. Leave 3/4 of head space in the jar so you have room to shake the butter.
Once butter is in the jars, carefully wipe off the top of the jars. Get a hot lid from your simmering water and place on top of the jar. Then seal tightly with the ring. Wait for your butter jar to "ping". When the jars are still warm being shaking them. Do this every so often until the jars have cooled off.
It's time to place the jars in the fridge.
You will then set your timer for 5 minutes. Once the timer goes off you will shake each jar. You will continue to do this until the butter becomes a solid. This process takes about 30 minutes.
Look how pretty it looks! The wonderful thing about the butter. . . it will not melt! It will last for up to 5 years, maybe longer we just don't know yet!