2 c. butter
1 c. sugar
2 eggs
1 tsp. vanilla
1 c. yogurt
2 c. flour, sifted
1 tsp. baking soda
1 tsp. baking powder
1/2 tsp. salt
Nut mixture (see below)

Cream butter and sugar until fluffy, beat in eggs, one at a time. Add vanilla. Alternately add sifted dry ingredients and yogurt, 1/3 at a time. Beat until smooth. Spread half of batter in greased and floured 9 x 12 x 2 inch pan. Sprinkle half of nut mixture over batter. Pour remaining half of batter and top with remaining nut mixture.

NUT MIXTURE:

1 tsp. cinnamon
1/3 c. brown sugar
1/4 c. sugar
1 c. walnuts, chopped

Mix all ingredients, use as directed in step 3 above. Bake in 350 degree oven for 35 minutes. Serves 12.