Gingerbread Cake (MOM)

3 cups flour
2 tsp. baking soda
1/2 tsp. salt
2 tsp. ginger
2/3 cup margarine
1 c. white sugar
2 eggs
1 cup molasses
1 1/2 cups boiling water

Sift flour, baking soda, salt and ginger 3 times.  Cream margarine until light and fluffy.  Add sugar gradually, beating well.  Add unbeaten eggs, beat briskly.  Add molasses then dry ingredients.  Beat until smooth.  Stir in boiling water.  Put in greased 9″x13″ pan and bake at 350 for 30 minutes or until cooked.