For Version 1, grind nuts in a food processor to a fine paste then add remaining ingredients. Adjust to taste with more sugar if needed and more milk until a spreadable consistency is formed.
For Version 2, grind nuts in a food processor to a fine paste. In a separate bowl add butter to melted chocolate, stirring until smooth. Whisk in cream and salt, and nut paste.
For both, pour into jars and keep in fridge until needed.