Combine frozen berries, lemon juice, and vanilla in a saucepan and let boil. Let simmer for a couple of minuts before removing from heat
Blend the nuts in a foodprocessor to a rough flour. Add the raisins, dates (chopped), coconut, flour, oatmeal, sugar, salt, and cocoa
Melt the chocolate and butter in a water bath. When melted, add the whipping cream and coffee and stir till it has an even texture
Combine the chocolate, berries, content in foodprocessor, and rum in a bowl and stir till it has an even texture
Let the dough cool in the fridge while making the butter cream and marzipan layer
Butter Cream
Whisk all the ingredients together in a bowl using an electric whisk til the butter has a thick, airy texture
Marzipan Layer
Knead all the ingredients together on a kitchen table with your hands. You can grate the marzipan before kneading to make it easier
Putting The Cake Together
The truffles are rolled into one or mores longe sausages of 3-4 cm in width
On a piece of baking-sheet, roll the marzipan layer into a thin, rectangular piece using a rolling pin. Sprinkle the marcipan with some powdered sugar if the marzipan sticks to the pin
Cut the marzipan into strips with the same length as the truffle-sausages' and wide enough to reach all the way around the truffle sausages plus a little more. The width of each marzipan strip should be approx. 10.5-14 cm in length depending on the diameter of your truffle sausages
Apply a thin layer of butter cream on top of the marzipan
Each truffle-sausage is placed on a marzipan strip and the marzipan is rolled around the sausage
The long truffle sausages covered in marzipan are now put in the fridge for 30 min - 1 hour until they are cold
The sausages are then cut into several small sausages of 8-10 cm in length
Melt the chocolate (for the chocolate decoration) in a water bath
The cakes' ends are dipped in the melted chocolate and placed on a clean piece of baking paper
Let the cakes cool at room temperature and serve
Notes
The truffle-sausages are easier to cover in marcipan or dip in chocolate if they have cooled in the fridge for a couple of hours or over-night right after they have been rolled into sausages