Zucchini Bars and Caramel Frosting

I got this recipe from a sweet little neighbor lady many years ago. I thought some of you readers may have gardens and might try these as a way to use the extra squash. These are very good.
Sift together:
3 cups flour
1 1/2 tsp. soda
1 tsp. baking powder
1 tsp. salt
1/2 tsp. cloves
1/2 tsp. nutmeg

Cream together:
3/4 cup margarine
1 cup brown sugar
1/2 cup granulated sugar
1 tsp. vanilla
2 eggs, beaten

Add:
2 cups peeled and grated zucchini
3/4 cup nuts
1/2 cup butterscotch chips
1/2 cup raisins
1/4 cup milk
Bake in greased and floured pan 10 x 15 for 20--25 minutes at 350 degrees.

Caramel Frosting
1/2 cup margarine
1 cup brown sugar
1/4 cup milk
Boil margarine and brown sugar for 2 min. Add milk, bring to a boil second time.
Add 1 1/2 cups powdered sugar. Mix really well. Frost bars, cut and enjoy