Grandma's Grapenut Bread

This is my favorite toast for breakfast. I don't know where my Grandma Blackman came up with this recipe but she's been making this for as long as I can remember. It doesn't have any fat in it so it's very dense. It's almost too dry to eat plain but if you toast it with a little butter...yum!!!
Here's the recipe---

Grandma's Grapenut Bread

1 cup Grapenuts cereal

2 cups buttermilk

2 eggs

1 cup sugar

4 cups flour

4 tsp baking powder

1 tsp salt

1 tsp baking soda

1 tsp vanilla

Soak cereal in buttermilk. combine dry ingredients and then add eggs, vanilla and cereal mixture. Bake at 350 for 1 hour in 2 greased bread pans. you can add raisins to the batter also, but I never do.