On a hot pan, saute the peanuts for five minutes till roasted. Take care not to burn the peanuts.
Cool completely. Add the peanuts into a grinder and start grinding.
Initially it will powder and then slowly it will start to clump up and become buttery.
Add the remaining ingredients and continue grinding till nice and smooth.
Empty into a small clean jar and store in the fridge. Use up within 5 days.
For the smoothie, combine all ingredients in a blender and blend till smooth. Serve immediately!