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Warm Rhubarb Cake with Butter Sauce – Easy Spring Dessert Recipe

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A simple yet indulgent Warm Rhubarb Cake topped with a rich butter sauce. Perfect for spring desserts and make-ahead meals.

  • Total Time: 60–80 minutes
  • Yield: 12–16 servings

Ingredients

Scale
  • 2 cups granulated sugar
  • 6 tbsp unsalted butter (melted)
  • 2 cups milk (whole milk preferred)
  • 4 tsp baking powder
  • ½ tsp salt
  • 4 cups all-purpose flour
  • 4 cups rhubarb (cut into ½-inch pieces)
  • For the sauce: ½ cup unsalted butter, ¾ cup whipping cream, 1 cup granulated sugar

Instructions

  1. Preheat oven to 350°F. Grease a 9×13-inch pan.
  2. Whisk flour, sugar, baking powder, and salt together in a large bowl.
  3. Add rhubarb, milk, and melted butter. Stir until just combined; do not overmix.
  4. Pour batter into prepared pan and spread evenly.
  5. Bake 45–60 minutes or until toothpick comes out clean. Cool slightly.
  6. For the butter sauce, combine butter, sugar, and cream in a saucepan. Bring to boil over medium heat, stirring frequently. Boil 1 minute, remove from heat, cool slightly.
  7. Cut cake into pieces and drizzle each piece with warm butter sauce before serving.

Notes

  • Can bake cake ahead and reheat individual servings with butter sauce.
  • Fresh or frozen rhubarb works; toss frozen rhubarb with a bit of flour if using to prevent excess moisture.
  • Store cake in airtight container at room temp for 2 days, sauce separately in fridge up to 5 days.
  • Freeze cake without sauce for up to 3 months.
  • Author: lily
  • Prep Time: 15–20 minutes
  • Cook Time: 45–60 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian