Peel bananas and beat in mixer until liquified. Add sugar, eggs, oil and rum, beat until well combined. Combine flour, baking powder, soda, salt and allspice. Beat flour mixture into banana mixture until blended. Stir in raisins and walnuts. Pour into 10-inch greased or sprayed fluted tube pan. Bake in 350'F. oven for 50 to 60 minutes or until cake tests done. Cool in pan for 10 minutes, then invert on wire rack to cool completly. Dust with confectioner's sugar if desired. ----