1 c. broken walnuts
1/3 c. packed brown sugar
1 tsp. cinnamon
1/4 c. butter
1/3 c. flour
2 medium pears, peeled and diced (2 c.)
2 tsp. lemon juice
1 3/4 c. flour
3/4 tsp. baking powder
1/2 tsp. baking soda
1/4 tsp. salt
1/2 c. butter, softened
1 c. sugar
1 tsp. vanilla
2 eggs
1 (8 oz.) carton sour cream

Preheat oven to 350°F. Grease 9-inch spring-form pan. Combine 1 cup nuts, brown sugar and cinnamon. For topping, cut 1/4 cup butter and 1/3 cup flour for coarse crumbs. Stir in 1/4 cup of nut mixture. Set both mixtures aside. Toss pears with lemon juice and set aside. Mix the flour, baking powder, soda and salt; set aside. In large bowl beat the 1/2 cup butter, sugar and vanilla. Add eggs one at a time. Add flour mixture and sour cream alternately to batter. Beat on low speed after each addition. Spread 2/3 mixture in prepared pan. Sprinkle with nut mix and layer pears on top. Spread with rest of batter and sprinkle topping.

Bake 10 minutes and sprinkle with 1/2 cup more walnuts.

Bake 50 minutes more.