01 - In a medium mixing bowl, combine the rolled oats, milk, Greek yogurt, chia seeds, maple syrup, and vanilla extract. Stir thoroughly until all ingredients are evenly incorporated.
02 - Pour the cooled brewed coffee over the oat mixture and fold gently until the coffee is fully blended throughout.
03 - Divide the oat mixture evenly between two jars or airtight containers, pressing lightly to level the surface.
04 - In a small bowl, blend the mascarpone cheese, Greek yogurt, and maple syrup together until smooth and creamy with no lumps remaining.
05 - Spoon the mascarpone mixture over the oats in each jar, spreading it into an even layer across the top.
06 - Seal the jars tightly with lids and refrigerate for a minimum of 6 to 8 hours. This resting period allows the oats to absorb the liquid and the flavors to develop fully.
07 - Before serving, use a fine mesh sieve to dust the tops generously with unsweetened cocoa powder. Add dark chocolate shavings if desired. Serve chilled directly from the jar.