In a small food processor or with a hand blender, process the avocado, peanut butter, vanilla and salt until smooth.
Add the protein powder, cocoa powder, and chocolate chips, and pulse until a 'dough' is formed. Add extra cacao powder or protein powder if it is too wet (this will depend on the avocado and protein powder)
Taste and then add Stevia drops to make it sweeter if desired. This will depend on the sweetness of your protein powder.
Take small Tablespoons of dough and roll into balls. Roll in the additional cocoa powder (if desired). Store in the fridge in an airtight container for up to 3 days.