Measure out all the ingredients.
Add oats to a blender and pulse a few times.
Pour in almond milk and blend.
Add banana slices, peanut butter, cinnamon, maple syrup, vanilla extract, and salt.
Blend on high until smooth and creamy.
Toss in ice cubes and blend again until chilled.
Taste and adjust sweetness or thickness if needed.
Serve immediately and enjoy your peanut butter oatmeal smoothie!