Add all the ingredients to your blender and process until smooth. Enjoy!
Notes
Don't sub for fresh banana unless absolutely necessary. Frozen banana really works best.If you don't have frozen bananas, you may peel and slice fresh ones and freeze for 30-60 minutes. Make sure to slice them first to help them freeze faster.To use fresh bananas, if you really don't have the time to freeze them, add a handful of ice cubes to the smoothie as well to get similar results.Make sure your bananas are VERY ripe. The sweetness is all coming from your bananas here, so the riper the better. Choose bananas that have spotted brown skins before freezing.For a sweeter smoothie, you may add a teaspoon of pure maple syrup or 2-3 pitted dates.If you don't have walnuts, you may sub for almonds, hazelnuts, or pecans.For best results, use a high speed blender, but if you don't have one, soak your walnuts for about 10-15 minutes or so in fresh water and then drain. This will make it easier for your blender to process them, without leaving any grittiness behind.Makes approx 3.5 cups.