Ingredients
1 1/4 cups white sugar
1 teaspoon baking soda
1/2 teaspoon salt
2 cups all-purpose flour
2 eggs, beaten
1 cup sour cream
3 cups diced rhubarb
1 cup turbinado sugar
1/4 cup butter, softened
1/4 cup all-purpose flour
1/2 teaspoon ground cinnamon
Directions
1. Preheat the oven to 350 degrees F (175 degrees C). Grease and flour a 9x13 inch baking dish.
2. In a large bowl, stir together 1 1/4 cups sugar, baking soda, salt, and 2 cups flour. Stir in the eggs and sour cream until smooth, then fold in the rhubarb. Pour into the prepared dish and spread evenly. In a smaller bowl, stir together the remaining 1 cup sugar and butter until smooth. Stir in 1/4 cup flour until the mixture is crumbly. Sprinkle the mixture on top of the cake then dust lightly with cinnamon.
3. Bake in the preheated oven for about 45 minutes, or until a toothpick comes out clean.
The recipe is from Allrecipes.com