Place all ingredients in a blender or food processor and pulse until smooth and creamy.
Scrape chocolate spread from pan and serve as a dip or spread. Wash blender right away or it will be difficult to clean.
Keep leftovers in a sealed container in the refrigerator for up to 4 days. Use as a dip for fruit such as strawberries, sliced banana, or apples, or as a spread.
Notes
If you aren't following a sugar free diet or don't like stevia, you can sub in 1-2 Tbsp. pure maple syrup, honey or agave nectar to taste.
For a stronger peanut butter flavor, add 2-3 Tbsp. of peanut butter to the blender along with other ingredients. Add extra milk if needed to thin it out.