Place the butter in a large bowl and soften it with the back of a spoon. Cream the butter, egg yolks and sugar, then blend in the cocoa, the vanilla extract, the liqueur, the biscotti and the almonds.
Working quickly to avoid melting the butter, turn the mixture out and form it into the shape of a sausage. Wrap it tightly in plastic wrap and let it set in the freezer for 4 hours. Serve slightly thawed, sliced like a salami.
*RAW EGG WARNING
Food Network Kitchens suggest caution in consuming raw and lightly-cooked eggs due to the slight risk of Salmonella or other food-borne illness. To reduce this risk, we recommend you use only fresh, properly-refrigerated, clean, grade A or AA eggs with intact shells, and avoid contact between the yolks or whites and the shell.