For an extra layer of flavor, consider adding a dash of cinnamon or a drizzle of honey to the oat mixture. Feel free to experiment with different types of yogurt, nut butters, and toppings to create your own signature version of this breakfast delight. If you prefer a sweeter treat, add a touch of maple syrup or agave nectar to taste. Overnight oats can be stored in the refrigerator for up to 3 days, making them a perfect make-ahead breakfast option.