Mash the banana. In a small bowl, mash the ripe banana with a fork until mostly smooth.
A few small lumps are fine for texture.
Combine oats and liquid. Add oats and your chosen liquid to a small saucepan. Stir in cinnamon if using.
Cook on low. Bring to a gentle simmer over medium heat, then lower to a soft bubble. Cook for 4–6 minutes, stirring often, until thick and creamy.
For quick oats, 2–3 minutes is usually enough.
Stir in banana. Remove from heat and stir in the mashed banana. This keeps the banana flavor bright and avoids overcooking.
Boost nutrition. Mix in ground flax or chia seeds. If using yogurt, let the oatmeal cool for 1–2 minutes first, then stir it in for extra creaminess.
Add healthy fats. Swirl in a small spoon of nut or seed butter.
This makes the bowl more filling and adds flavor.
Cool to toddler-safe. Spread the oatmeal thinly in the bowl to cool faster. Test the temperature before serving.
Top and serve. Add soft fruit or a sprinkle of hemp hearts. Keep toppings simple and small to reduce choking risk.