Cover medium baking sheet with parchment or use a nonstick silicone baking mat.

In large bowl, combine cream cheese, peanut butter, vanilla, butter, sweetener, and cocoa powder and beat with an electric mixer until fluffy and creamy, approximately 30-45 seconds.

Chill for 10 minutes to firm up batter if necessary, then using a cookie scoop or spoon, scoop out one tablespoon of batter and roll to form a bowl. If desired, roll balls in finely chopped chocolate. Place on parchment paper or silicone baking mat. Repeat with remaining batter to form 14 snack bites. Place in freezer for 20 minutes to firm up, then store in an airtight container in the refrigerator for up to 14 days.