1 (2-pound) frozen mrs. smith's blackberry cobbler |
1 (18.25-ounce) package white cake mix |
1 1/4 cups milk |
2 large eggs |
1/4 cup butter or margarine, melted |
1/2 cup all-purpose flour |
1/3 cup sugar |
1/3 cup firmly packed light brown sugar |
1/2 teaspoon ground cinnamon |
1/4 teaspoon salt |
1/4 cup cold butter or margarine, cut into pieces |
1/2 cup chopped walnuts, toasted |