Combine the oats, cream, cinnamon, vanilla extract, maple syrup, and melted butter in a mixing bowl. Stir thoroughly until everything is evenly coated and the mixture looks creamy and fragrant.
Pour the mixture into a clean jar or container with a lid, spreading it out evenly.
Seal the jar tightly and place it in the refrigerator overnight or for at least 6 hours. During this time, the oats will soak up the flavors and become tender.
In the morning, open the jar and give the oats a gentle stir to loosen them up, revealing a creamy, speckled mixture with a cinnamon swirl.
Serve the cinnamon roll overnight oats with an extra sprinkle of cinnamon or a drizzle of syrup if desired. Enjoy the soft, thick, and fragrant breakfast directly from the jar.