Mary Jane's Rhubarb Cake

"This is my grandmother-in-law's recipe. I forgot to write down the title, so I just put her name into it."

INGREDIENTS:

1/2 cup (1 stick) butter

1 1/2 cups sugar

1 egg

1 cup buttermilk (or substitute 1 cup sour cream)

1 teaspoon baking soda

1 teaspoon vanilla extract

2 1/2 cups flour

3 cups rhubarb sliced thin

1 cup brown sugar

Topping:

1/2 cup (1 stick) butter

1 cup sugar

1/2 cup evaporated milk

1 teaspoon vanilla extract

Preheat oven to 350 degrees F. Mix first seven ingredients together in large bowl. Mix in rhubarb. Spread into greased 9x13 baking dish. Sprinkle with brown sugar. Bake for 45 minutes.

Put topping ingredients into small saucepan and cook over medium heat until butter is melted and sugar disolved. Bring to a boil and boil (stirring constantly) for five minutes. Pour over warm cake.