In a small saucepan, combine the frozen dark sweet cherries and water over medium heat. Cook for about 5–7 minutes until the mixture becomes syrupy.

In a medium mixing bowl, combine the old-fashioned rolled oats, chia seeds, unsweetened cocoa powder, maple syrup, milk, and vanilla extract. Stir until fully blended and smooth.

Scoop half of the oat mixture into a clean glass jar, smoothing it out evenly.

Spoon cherry compote over the first oat layer, spreading it evenly.

Add the remaining oat mixture on top of the cherry compote layer, smoothing it out.

Spoon plain Greek yogurt on top of the final oat layer, creating a swirl for added flair.

Sprinkle dark chocolate chips or shavings over the Greek yogurt layer for a decadent touch.

Seal the jar and refrigerate for at least 6 hours or overnight.