In a mason jar, add in the rolled oats, milk, greek yogurt, chia seeds, and banana pudding mixture. Mix well together.
Add in the crushed graham crackers and give one more light mix so the graham crackers aren't fully incorporated but every bite should have a little bit!
Lastly, add your banana in small slices either right before you eat it, within the mixture or half and half.
Store in the fridge overnight or minimally for 2 hours with a lid.