Ingredients

• Cake:
• 2 cups chopped rhubarb
  
• 1 ¹/₂ cups white sugar
  
• ¹/₂ cup butter
  
• 1 egg
  
• 1 teaspoon vanilla
  
• 1 cup all purpose flour
  
• 1 teaspoon baking soda
  
• ¹/₂ teaspoon salt
  
• 1 cup buttermilk
  

• Topping:
• ¹/₄ cup butter
  
• 3 teaspoons cinnamon
  
• 1 cup brown sugar