01 - In a medium mixing bowl or mason jar, add the old-fashioned rolled oats, milk, brewed coffee, packed brown sugar, Greek yogurt if using, chia seeds if using, vanilla extract, and a pinch of salt. Stir thoroughly with a spoon to ensure an even mixture.
02 - Cover the bowl or jar securely and place it in the refrigerator for at least 8 hours or overnight to allow the oats to absorb the liquid and flavors.
03 - After refrigeration, stir the oat mixture. For a creamier texture, add a small splash of milk if needed.
04 - Divide the oats evenly between bowls or jars. Garnish each serving with sliced banana, chopped toasted nuts, and additional brown sugar or maple syrup to taste.
05 - Serve immediately while chilled. Enjoy as an energizing breakfast.