Rhubarb Cake with Butter Sauce

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Rhubarb Cake with Butter Sauce is a classic comfort dessert—soft, tender cake studded with tart rhubarb and served warm with a rich, sweet butter sauce poured over the top. The contrast of tangy fruit and silky sauce makes every bite irresistible.

Why You’ll Love This Cake

  • Perfect balance of tart and sweet
  • Moist, tender crumb
  • Warm butter sauce adds indulgent richness
  • Great for family desserts or gatherings

Preparation Time

  • Prep Time: 20 minutes
  • Bake Time: 35–40 minutes
  • Sauce Time: 10 minutes
  • Total Time: about 1 hour

Ingredients

Cake:

  • 2 cups all-purpose flour
  • 1 1/2 cups sugar
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 cup buttermilk
  • 1/2 cup melted butter
  • 1 large egg
  • 1 teaspoon vanilla extract
  • 2 cups rhubarb, chopped

Butter Sauce:

  • 1/2 cup butter
  • 1 cup sugar
  • 1/2 cup heavy cream
  • 1 teaspoon vanilla extract

How to Make Rhubarb Cake with Butter Sauce

Step 1: Prepare Batter

Preheat oven to 180°C (350°F).

In a bowl:

  • Mix flour, sugar, baking soda, and salt

In another:

  • Whisk buttermilk, melted butter, egg, and vanilla

Combine wet and dry ingredients, then fold in chopped rhubarb.

Step 2: Bake

  • Pour batter into a greased pan
  • Bake for 35–40 minutes until set and lightly golden

Step 3: Make Butter Sauce

In a saucepan:

  • Melt butter
  • Add sugar and cream
  • Cook over medium heat until smooth and slightly thickened
  • Stir in vanilla

Step 4: Serve

  • Slice cake while warm
  • Pour butter sauce generously over each piece

Tips for Best Results

  • Use fresh rhubarb for best flavor
  • Do not overbake to keep cake moist
  • Serve warm for the best texture and flavor
  • Adjust sugar if your rhubarb is very tart

Variations

  • Add strawberries for a strawberry-rhubarb version
  • Sprinkle cinnamon sugar on top before baking
  • Add chopped nuts for crunch
  • Use a caramel sauce instead of butter sauce

Storage

  • Store cake in the refrigerator for up to 4 days
  • Reheat before serving
  • Store sauce separately and rewarm

Calories (Approximate)

  • Per serving (with sauce): 350–450 calories

Final Thoughts

Rhubarb Cake with Butter Sauce is a timeless dessert that combines simple ingredients into something rich, comforting, and full of flavor. The buttery sauce takes it to the next level, making it perfect for any occasion.

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