Prep your ingredients. Cut the avocado in half, remove the pit, and scoop out the flesh. Peel your banana and break it into chunks. This makes blending easier and faster.
Add liquids first. Pour your milk into the blender before adding anything else. This prevents ingredients from getting stuck at the bottom and helps everything blend smoothly.
Toss in the fruits. Add your avocado chunks and banana pieces to the blender. If you're using any optional ingredients like honey or vanilla, add them now.
Add ice and seasonings. Drop in your ice cubes and sprinkle in that pinch of cinnamon. The ice makes it refreshingly cold and adds thickness.
Blend until smooth. Start on low speed and gradually increase to high. Blend for about 30-45 seconds until everything is completely smooth and creamy. You shouldn't see any avocado chunks!
Check consistency and adjust. If it's too thick, add a splash more milk. Too thin? Add more ice or a few more avocado chunks. Taste and adjust sweetness if needed.
Serve immediately. Pour into your favorite glass and enjoy right away for the best texture and flavor. You can garnish with a sprinkle of cinnamon or a few banana slices if you're feeling fancy.