Gather your ingredients. Measure out the oats, banana, almond milk, peanut butter, maple syrup, vanilla extract, cinnamon, and salt. If you’re using ice, set that aside as well.
In your blender, combine the oats, frozen banana chunks, almond milk, peanut butter, maple syrup, vanilla extract, cinnamon, and salt.
Start blending on low speed, gradually increasing to high. Blend until the mixture is completely smooth and creamy. If you prefer a thicker consistency, add some ice and blend again until well combined.
After blending, taste your smoothie. If you prefer it sweeter, add a little more maple syrup and blend again.
Pour your Oatmeal Smoothie into a glass or mason jar, and enjoy immediately. You can also top it with a sprinkle of cinnamon or a drizzle of peanut butter for an extra touch.