01 - In a medium mixing bowl or mason jar, add rolled oats, milk, cooled coffee, brown sugar, Greek yogurt if using, chia seeds if desired, vanilla extract, and a pinch of salt. Stir thoroughly to ensure even incorporation.
02 - Cover the container and refrigerate for a minimum of 8 hours or overnight to allow the oats to absorb the liquid and flavors.
03 - In the morning, stir the mixture well. If a creamier texture is preferred, add a splash of milk and blend until smooth.
04 - Divide the oats evenly between bowls or jars. Top each serving with sliced banana, chopped toasted nuts, and additional brown sugar or maple syrup as desired.
05 - Enjoy the oats cold, straight from the refrigerator.