At 8 points a slice, this is not remotely "point free." If you want to trim some points you can back off on the nuts. If you reduce the amount of nuts to 1/4 cup it will take the points per serving down to 7 points per slice.
Heat the oven to 350°F. Brush an 8 or 9-inch cake pan with some of the butter. Combine in a bowl all the ingredients, including the remaining butter. Stir to combine. Pour into the prepared pan. Bake until the cake pulls from the sides of the pan, about 30 minutes. Remove to a rack to cool slightly. Dust with confectioners' sugar. Slice with a serrated knife. Serve garnished with apple crisps.