Combine yogurt and almond milk in a medium bowl.
Stir in chia seeds, oats, and blueberries.
Cover bowl and place in the fridge overnight, or at least 3 hours.
To assemble, fill two 12-ounce mason jars halfway with oat mixture.
Add blueberry jam and peanut butter and top with remaining oats.
Cover jars and place in the fridge for later or enjoy immediately!