In mixing bowl, combine all ingredients for blackberry layer. Using back of fork, mash blackberries and mix everything together. Cover and refrigerate 4 hours to overnight. (Note: The mixture will be runny until the chia seeds absorb liquid to create a gel.)

In mixing bowl, combine banana layer ingredients, mashing banana and mixing together well. Cover and refrigerate alongside berry mixture.

In 4 mason jars or in bowls with lids, evenly divide blackberry mixture in a layer followed by the banana mixture. Top with optional toppings of choice and enjoy.

To store, seal jars with lids and refrigerate up to 3 days.