Topping: | ||
1 | tbsp. | all purpose flour |
1/3 | cup | packed brown sugar |
2 | tbsp. (1/4 stick) | butter or margarine, softened |
1/2 | cup | chopped nuts |
2 | cups (12 oz. pkg) | Nestle Toll House semi sweet chocolate morsels, divided |
Cake: | ||
1 3/4 | cup | all purpose flour |
1 | tsp. | baking powder |
1 | tsp. | baking soda |
1/4 | tsp. | salt |
1/2 | cup (1 stick) | butter or margarine, softened |
3/4 | cup | granulated sugar |
1 | tsp. | vanilla extract |
3 | eggs | |
1 | cup | sour cream |