With an electric mixer, beat together butter and

brown sugar until creamy.

Add eggs, vanilla, and orange peel; beat until fluffy.

In a separate bowl, mix together flour, baking powder, baking soda,
salt and carob powder.

Add to butter mixture alternately with the

buttermilk, mixing well after each addition.

Stir in chopped nuts.

Mix thoroughly.

Pour batter into a greased 9x12-inch baking pan.

Bake in a 350° oven for about 45-50 minutes or until a

wooden pick inserted in center comes out clean.

Cool on a rack for 10 minutes.