while canning jam or jelly can you put peanut butter inside the jar with it? can both together?
Commercial peanut butter is shelf stable for several months in your pantry, however it is not acidic enough for home canning. When you remove most of the air in home canned goods you are actually setting up a good environment for botulism to grow. Botulism can’t thrive in an acidic conditions, that is why a low ph is essential for safe home canning.