Butterfinger crumb cake

2 cups all-purpose flour
1 cup firmly packed brown sugar
1/2 cup granulated sugar
1/2 cup (1 stick) butter or margarine, softened
1 (2.1-oz.) NESTLER BUTTERFINGERR Candy Bar, finely chopped
1 teaspoon baking soda
1/2 teaspoon salt
1/2 cup milk
1/2 cup plain yogurt
1 large egg
1 teaspoon vanilla extract
Total time: 50 min

1.Preheat oven to 350? F. Grease 8-inch-square baking pan.
2.Combine flour, brown sugar and granulated sugar in a medium bowl; cut in butter with a pastry blender or two knives until mixture resembles coarse crumbs. Transfer ? cup flour mixture to a medium bowl; stir in Butterfinger pieces.
3.Stir baking soda and salt into remaining flour mixture. Combine milk, yogurt, egg and vanilla extract in a small bowl until blended. Add to flour mixture; stir just until blended. Pour into prepared pan; sprinkle evenly with Butterfinger mixture.
4.Bake for 40 to 45 minutes or until wooden pick inserted in center comes out clean. Cool slightly in pan on a wire rack. Serve warm.