This is a family recipe by Eileen Jones, modified by my wife.
Preheat oven to 350 degrees.
In a medium saucepan combine:
Cook on low heat, stirring until smooth.
Remove from the heat and stir in:
In a food processor combine until the texture resembles a coarse sand or brown sugar that holds shape when pinched:
Then add to the food processor and combine to make a crumbly texture (the machine's sound will deepen):
Distribute the crumbly mixture and squish it to cover the entire bottom of a 9x13 pan. Spread the melted chocoolate-and-nut filling over that.
Then use the food processor to make a second copy of the same crumbly mixture.
Again we first combine the flours and fats until the texture resembles a coarse sand or brown sugar that holds shape when pinched:
Again we add and combine in the food processor to make a crumbly texture (the machine's sound will deepen):
Sprinkle the second bunch of crumbly mixture on top. This time let it stay as coarse crumbles, instead of squishing it to cover the entire pan.
Bake for 30-40 minutes until golden.
There is no need to transfer it to a cooling rack.
If you cut it into cookie bars, these may be frozen.