Ingredients

• 1.5 cups white sugar
• 0.5 cups butter
• 1 large egg
• 1 teaspoon vanilla extract
• 2 cups all-purpose flour
• 1 teaspoon baking soda
• 0.25 teaspoons salt
• 1 cup buttermilk
• 2 cups rhubarb , chopped
• 1 tablespoon all-purpose flour
• 1 cup packed brown sugar
• 0.25 cups butter
• 2 teaspoons ground cinnamon

Instructions

1. 1 Gather the ingredients. Preheat the oven to 350 degrees F (175 degrees C). Lightly butter a 9x13-inch baking pan.
2. 2 Beat butter and sugar together in a large bowl with an electric mixer until light and fluffy in color. Beat in egg and vanilla.
3. 3 Sift 2 cups flour, baking soda, and salt together in a separate bowl; add alternately with buttermilk to butter mixture.
4. 4 Toss rhubarb with 1 tablespoon flour, and stir into batter. Spoon batter into prepared baking pan and smooth the surface.
5. 5 Mix brown sugar, 1/4 cup butter, and cinnamon together; sprinkle evenly over batter.
6. 6 Bake in preheated oven until a toothpick inserted into the cake comes out clean and the top is golden, about 45 minutes.
7. 7 Enjoy!

Nutrition per serving