2/3 cup white sugar
1/2 cup vegetable oil
2 eggs
1 teaspoon vanilla extract
1 1/2 cups all-purpose flour
1 teaspoon baking soda
1/4 teaspoon salt
1 (8 ounce) container plain yogurt
1/2 cup raisins
TOPPING:
1/2 cup walnuts, chopped
1/3 cup packed brown sugar
2 teaspoons ground cinnamon