INGREDIENTS
2 1/2 cups
flour
1 tsp
baking soda
1 tsp
baking powder
1/2 tsp
salt
1 1/4 cups
brown sugar
1/2 cup
vegetable oil
1
egg
1 tsp
vanilla extract
1 cup
buttermilk
1 1/2 cups
diced rhubarb
1/2 cup
chopped walnuts
1 tbsp
melted butter
1/3 cup
white sugar
1 tsp
ground cinnamon