pure vanilla extract
1Preheat oven to 325. Lightly grease 2 9x5 loaf pans. Stir together milk, lemon juice, and vanilla. Let stand 10 minutes.
2Mix brown sugar, oil and egg together. Combine flour, salt and baking soda and stir into sugar mixture alternating with milk mixture until combined.
3Fold in rhubarb and walnuts. Pour into pans. Combine 1/4 brown sugar, cinnamon and butter. Sprinkle over loaves.
4Bake 40 minutes or til done.