Prep your banana. Use one large ripe banana.
For extra creaminess, peel, slice, and freeze it the night before. Fresh bananas also work.
Add oats to the blender first. Use 1/4 to 1/3 cup rolled oats. Adding them first helps them break down smoothly.
Pour in the liquids. Add 3/4 to 1 cup milk and 1/4 cup yogurt.
Adjust milk to reach your preferred thickness.
Flavor it. Add 1/4 to 1/2 teaspoon cinnamon, 1/2 teaspoon vanilla extract, and a tiny pinch of salt if using.
Boost it. Add 1 tablespoon peanut or almond butter for richness and protein. Include a drizzle of honey or 1 date if you prefer it sweeter.
Add the banana and ice. Drop in the banana slices. If you want it colder, add a few ice cubes.
Blend until completely smooth. Start low, then go high for 30–45 seconds.
If it’s too thick, add more milk. If it’s thin, add a few oats and blend again.
Taste and adjust. Add more cinnamon for warmth, a touch more sweetener if needed, or another spoon of nut butter for body.
Serve right away. Pour into a large glass or a lidded to-go cup. Sprinkle with a little cinnamon or crushed oats on top if you like.