Begin by selecting a jar or bowl to mix your Brownie Batter Overnight Oats. Add rolled oats, chia seeds (if using), unsweetened cocoa powder, salt, and 1 tablespoon of mini chocolate chips. Stir the components together until well combined.

Pour in your choice of milk, whether dairy or plant-based, into the jar. Follow with maple syrup and vanilla extract, then add Greek yogurt or nut butter. Stir or shake the jar until smooth.

Seal the jar tightly and place it in the refrigerator for at least 4 hours, or ideally overnight.

Upon waking up, retrieve your jar from the fridge and give it a good stir. If too thick, add a splash of milk to achieve desired consistency.

Garnish with remaining chocolate chips, a sprinkle of berries, or nut butter before serving.