Add the peanut butter, chia seeds, hemp hearts, brown sugar, and unsweetened cocoa powder into the mason jar.
Add ½ cup of milk.
Using a fork or small hand whisk, mix all the ingredients. Break the peanut butter. It's ok if it doesn't blend well; break it down a little and mix them all.
Now add the rolled oats.
Mix well, add ¼ more cup of milk, and ensure oats are nicely immersed inside the milk.
Close the mason jars and refrigerate for 4 hours or overnight.
After 6 hours, top it up with nuts and fruits and serve chilled or transfer it to a bowl and microwave for 30 to 45 seconds. Add more milk if required and add the toppings and serve warm.
Notes
Skip the nut butter for a nut-free version.
Use maple syrup or agave nectar, or other sweeteners of your choice.
I have tested this recipe only with almond milk and dairy milk, but you can use any milk of your choice. Opt for plant-based milk for a vegan version.
There is no set measure for these overnight oats; adjust them as per your preference.