01 - In a medium mixing bowl or mason jar, combine rolled oats, milk, cooled brewed coffee, brown sugar, Greek yogurt if using, chia seeds if using, vanilla extract, and a pinch of salt. Stir thoroughly to ensure all ingredients are well incorporated.
02 - Cover the container and refrigerate for at least 8 hours or overnight, allowing the oats to absorb the liquid and flavors.
03 - In the morning, stir the oat mixture well. Add an extra splash of milk if a creamier consistency is desired.
04 - Portion the oats into serving bowls or jars. Garnish with sliced banana, toasted nuts, and additional brown sugar or maple syrup to your preference.
05 - Enjoy chilled, straight from the refrigerator.