Gather all your ingredients including non-dairy milk, yogurt, rolled oats, toasted pecans, matcha, cinnamon, sea salt, vanilla extract, frozen banana, and optional protein powder and ice.
In your blender, combine the non-dairy milk and plain yogurt. Blend on medium speed until smooth and creamy.
Add the rolled oats, matcha, ground cinnamon, sea salt, and vanilla extract to the blender. Blend again until thoroughly mixed and oats are broken down.
Add the frozen banana and optional vegan protein powder. Blend until completely smooth and creamy.
If you prefer a thicker smoothie, add a handful of ice and blend again. If too thick, add more non-dairy milk to desired consistency.
Add the toasted pecans and pulse the blender a couple of times to incorporate them without fully blending, leaving some chunks for texture.
Pour into a glass, garnish with extra toasted pecans if desired, and enjoy immediately.