Chop the couverture and the amarettini into small pieces. Mix the flour, baking powder, cinnamon and cocoa together. Mix the softened butter with the sugar until the sugar has dissolved. Stir in the eggs one at a time. Stir in the flour mixture together with the espresso in portions. Fold in the chocolate and biscuit crumbs.
Put everything in a greased bundt cake tin sprinkled with breadcrumbs and bake in the preheated oven at 170 ° C for about 50 minutes!