01 - In a medium bowl or jar, add oats, milk, yogurt, cocoa powder, chia seeds, maple syrup or honey, peanut butter, and vanilla extract.
02 - Stir vigorously until completely combined and peanut butter is fully incorporated into the mixture.
03 - Cover container and refrigerate overnight, or for 6-8 hours minimum, allowing oats and chia seeds to soften and thicken.
04 - In the morning, stir again. If too thick, add a splash of milk to reach desired consistency.
05 - Top with chocolate chips, chopped peanuts, and fresh fruit if desired. Serve chilled.