Best ever Brownies!

These brownies are an absolute hit and don't require frosting.  When I make these, I have to hand them out or they somehow disappear...

Super Brownies

1 ½ sticks (3/4 cups) margarine

6 Tbsp. cocoa

1 ½ cups sugar

3 eggs

1 1/3 cup flour

1 ½ cups chopped nuts

1 ½ tsp. vanilla

Melt butter in pan.  Add ingredients in given order.  Mix by hand.  Pour into greased and floured 9x13 inch pan.  Bake at 300 degrees for 30 min.  Frost while warm.

Frosting:

1 stick (½ cup)butter

6 Tbsp. milk

3 Tbsp. cocoa

Bring ingredients to boil; take off heat and add 1 lb. powdered sugar and 1 tsp. vanilla.