Cream together butter and sugar until light and fluffy. Add eggs, one at a time, beating well after each addition.

 Stir together buttermilk, pumpkin, molasses.

Whisk together flour, baking soda, salt and spices. Stir in orange rind.

Add 1/2 of the flour mixture to the butter mixture, then add some of the liquid mixture, repeating until all ingredients are combined and batter is smooth.

Transfer batter to a greased 9-inch square pan.

Bake in a preheated 325°F oven for 45-50 minutes or until a toothpick inserted in center of cake comes out clean.