Step 1

Place half of the tea biscuits into the bowl of a food processor and process until you get coarse crumbs. Break the rest of the tea biscuits into small pieces. (You can do this by hand. You can also place the biscuits into a plastic bag and then roll it with a rolling pin.) Transfer all the biscuits into a large bowl.

Step 2

Chop the walnuts into small pieces and add them to the biscuits. Mix to combine.

Step 3

Place the butter, sugar, milk, and cocoa powder into a saucepan and warm it over medium heat. Whisk until the cocoa powder is incorporated and all butter has melted.

Step 4

Add the cocoa mixture to the dry ingredients and mix with a spatula until everything is incorporated.

Step 5

Cut 3 pieces of parchment paper about 10 inches long each.

Step 6

Place about 1/3 of the mixture onto each piece of parchment and roll the mixture into a sausage shape. If your mixture doesn't hold shape, leave it for about 5 minutes to cool slightly. Once you roll the sausages, secure the ends of the parchment paper with strings or elastics.

Step 7

Place the salami into the fridge and let them cool for about 1 hour. Then take them out and roll them on a smooth surface to make the edges smoother (this step is optional). Place them back in the fridge for another 2 hours, or until the chocolate salami holds shape and can be easily cut with a sharp knife.

Step 8

To serve, cut the chocolate salami into slices ¼ of an inch thick.

Step 9

Store the salami in the fridge for up to 1 week or freeze them for up to 3 months.