01 - Combine oats, almond milk, Greek yogurt, cocoa powder, chia seeds, maple syrup, vanilla extract, and salt in a medium mixing bowl. Stir thoroughly until cocoa powder is fully dissolved and mixture is uniform.
02 - Divide the oat mixture evenly between two mason jars or airtight containers, ensuring equal portions for each serving.
03 - Cover containers and refrigerate for a minimum of 6 hours, preferably overnight. The oats will soften and the mixture will thicken considerably.
04 - Before serving, stir the oats well. If the consistency is too thick, add a splash of almond milk to reach desired texture.
05 - Top each portion with mini chocolate chips, banana slices, chopped nuts, and fresh berries as desired. Serve chilled.