In a large bowl, combine the biscuit mix, 1/4 cup Parmesan cheese, parsley and Italian seasoning. In a small bowl, whisk the eggs, milk and 1 tablespoon butter; stir into dry ingredients just until moistened.
Fill greased or paper-lined muffin cups three-fourths full. Pour remaining butter over tops; sprinkle with walnuts and remaining Parmesan cheese.
Bake at 400° for 15-17 minutes or until a toothpick comes out clean. Cool for 5 minutes before removing from pan to a wire rack. Serve warm.