Blend first 4 ingredients in a blender or food processor. Pour into drinking glass and garnish with walnuts.
*be sure to use a natural peanut butter, not the kind that has hydrogenated oils and sugar added.
This is a versitile recipe - you can use another kind of nut butter like almond or hazelnut, and use cashews or pecans instead of the walnuts. I wanted to add another tbsp of peanut butter, but I'm trying to get back to my pre-baby body so I'm foregoing such luxuries. Also, if you have vanilla soy milk or one that is already sweetened you can omit the stevia.