Cream together sugar and butter or margarine. Beat in eggs. Stir
together flour, and spices; add to creamed mixture alternately with
butter/sour milk, beating til well blended after each addition. Fold in
blackberry jam or preserves and nuts leaving swirls of jam. (DO NOT
OVERMIX) Turn into greased and lightly floured 9 x 9 x 2-inch baking pan.
Bake at 350 degree F. oven 25 minutes or until done. Cool completely.
Frost with Carmel Icing. CARMEL ICING: In small saucepan, melt butter or
margarine; stir in brown sugar. Cook stirring constantly, til mixture
bubbles; remove from heat. Cool 5 minutes. Stir in milk and blend in
powdered sugar; beat til spreading consistency is reached.