Rhubarb Cake with Velvety Butter Sauce



For the Cake:

  • 4 cups all-purpose flour
  • 2 cups granulated sugar
  • 4 teaspoons baking powder
  • ½ teaspoon salt
  • 4 cups rhubarb, diced (fresh or frozen)
  • 2 cups milk
  • 6 tablespoons butter, melted

For the Butter Sauce:

  • ½ cup (1 stick) butter
  • 1 cup sugar
  • ¾ cup heavy cream


1. Preheat and Prepare:

  • Preheat your oven to 350°F (175°C).
  • In a large bowl, whisk together the flour, sugar, baking powder, and salt until well combined.
  • Add the diced rhubarb, milk, and melted butter into the dry ingredients. Gently stir until just combined.

2. Bake to Perfection:

  • Grease a 9×13 inch baking pan and pour the cake batter into it, spreading it evenly.
  • Bake in the preheated oven for approximately 45 minutes, or until a toothpick inserted into the center comes out clean.

3. Cooling Grace:

  • Once baked, remove the cake from the oven and allow it to cool to room temperature in the pan. This allows the flavors to meld and intensify.

4. Crafting the Butter Sauce:

  • In a saucepan, combine the butter, sugar, and heavy cream.
  • Bring the mixture to a gentle boil over medium heat, stirring constantly.
  • Let it bubble for about a minute until it thickens slightly and becomes smooth. Remove from heat and let it cool for a few minutes.

5. Serving:

  • Slice the cooled cake into generous portions and place them on serving plates.
  • Drizzle each slice with the warm, velvety Butter Sauce, allowing it to cascade down the sides.
  • If the sauce cools and thickens too much, gently reheat it on the stove or in the microwave before serving.

Enjoy the delightful combination of moist Rhubarb Cake paired with the indulgent richness of Velvety Butter Sauce, a treat that will surely impress your guests!

Here are some helpful tips to make your Rhubarb Cake with Velvety Butter Sauce even more delightful:

  1. Choose Fresh Rhubarb: If possible, use fresh rhubarb for the best flavor and texture. Look for firm stalks with bright color and avoid any that are wilted or have soft spots.
  2. Adjust Sugar Levels: Taste your rhubarb before baking to determine its tartness. Depending on the sweetness of your rhubarb and personal preference, you can adjust the amount of sugar in the cake batter and butter sauce. Add more sugar if your rhubarb is particularly tart, or reduce it slightly if you prefer a less sweet dessert.
  3. Add Citrus Zest: Enhance the flavor of the cake by adding some citrus zest, such as lemon or orange, to the batter. The bright citrus notes will complement the tangy rhubarb and add an extra layer of complexity to the cake.
  4. Use Buttermilk: Substitute some or all of the milk in the cake batter with buttermilk for added tenderness and flavor. The slight tanginess of the buttermilk pairs beautifully with the rhubarb and balances out the sweetness of the cake.
  5. Incorporate Spices: Add warmth and depth to the cake by incorporating spices such as cinnamon, nutmeg, or cardamom into the batter. These spices will complement the flavor of the rhubarb and give the cake a deliciously aromatic quality.
  6. Serve with Whipped Cream: Serve each slice of rhubarb cake with a dollop of freshly whipped cream on top. The light and airy texture of the whipped cream will contrast beautifully with the dense cake and velvety butter sauce, creating a perfect balance of flavors and textures.
  7. Garnish with Fresh Berries: Before serving, garnish each slice of cake with a few fresh berries, such as strawberries or raspberries. Not only will they add a pop of color, but they will also complement the tartness of the rhubarb and add a juicy burst of flavor to each bite.
  8. Serve Warm: For an extra indulgent treat, serve the rhubarb cake warm with the velvety butter sauce poured generously over each slice. The warm cake will soak up the sauce, creating a melt-in-your-mouth dessert that is truly irresistible.

By following these tips, you can elevate your Rhubarb Cake with Velvety Butter Sauce to a whole new level of deliciousness and impress your family and friends with your baking skills!

Here are some tips to help you achieve perfection:

  1. Fresh Ingredients: Use fresh, high-quality ingredients for the best flavor and texture. This includes fresh rhubarb, high-fat butter, and good quality flour and sugar.
  2. Proper Rhubarb Preparation: When using fresh rhubarb, make sure to wash it thoroughly and remove any tough strings. Dice the rhubarb into uniform pieces to ensure even cooking and distribution throughout the cake.
  3. Correct Baking Technique: Ensure your oven is preheated to the correct temperature before baking. Follow the baking instructions closely and avoid over-baking the cake, as it can lead to dryness. Use a toothpick to test for doneness – it should come out clean or with a few moist crumbs attached.
  4. Balanced Sweetness: Rhubarb can be quite tart, so it’s important to balance its natural acidity with sweetness. Adjust the sugar levels in both the cake batter and butter sauce to achieve the perfect balance of sweet and tart flavors.
  5. Texture Matters: Pay attention to the texture of your cake batter. It should be smooth and well-mixed, but avoid over-mixing, as this can lead to a dense and tough cake. Fold in the rhubarb gently to prevent it from breaking down too much.
  6. Velvety Butter Sauce: When making the butter sauce, use high-quality butter and cream for the best flavor and texture. Be sure to stir the sauce constantly while it’s cooking to prevent it from burning or separating. Cook it just until it thickens slightly and becomes smooth and velvety.
  7. Serve with Care: Allow the cake to cool slightly before slicing and serving. Warm the butter sauce gently before drizzling it over each slice of cake for maximum indulgence. Serve with a scoop of vanilla ice cream or a dollop of whipped cream for an extra special treat.
  8. Attention to Detail: Pay attention to the little details, such as properly greasing the baking pan, evenly distributing the rhubarb in the cake batter, and ensuring the butter sauce is smooth and lump-free. These small details can make a big difference in the final outcome of your dessert.

By following these secrets, you’ll be well on your way to achieving the perfect Rhubarb Cake with Velvety Butter Sauce that will impress everyone who tries it!

Here are some popular questions and answers related to Rhubarb Cake with Velvety Butter Sauce:

  1. Q: Can I use frozen rhubarb instead of fresh for the cake?
    • A: Yes, you can use frozen rhubarb instead of fresh. Just make sure to thaw it completely and drain any excess liquid before adding it to the cake batter.
  2. Q: Can I make the cake ahead of time and reheat it before serving?
    • A: Yes, you can make the cake ahead of time and reheat it before serving. Simply store the cooled cake in an airtight container at room temperature or in the refrigerator, then warm it in the oven or microwave before serving.
  3. Q: Can I substitute the heavy cream in the butter sauce with milk?
    • A: While heavy cream provides richness and a velvety texture to the butter sauce, you can substitute it with milk if needed. However, the sauce may not be as rich and creamy.
  4. Q: How should I store leftover cake with butter sauce?
    • A: Store leftover cake in an airtight container in the refrigerator. The butter sauce may solidify when chilled, so gently reheat it before serving again.
  5. Q: Can I freeze the cake with butter sauce?
    • A: Yes, you can freeze the cake without the butter sauce. Wrap the cooled cake tightly in plastic wrap and aluminum foil, then store it in the freezer for up to three months. Thaw in the refrigerator before serving and prepare the butter sauce fresh.
  6. Q: What other fruits can I use instead of rhubarb?
    • A: You can experiment with other fruits such as strawberries, apples, or peaches in place of rhubarb. Adjust the sugar levels accordingly to balance the sweetness and tartness of the fruit.
  7. Q: Can I use a different type of sauce with the rhubarb cake?
    • A: While the velvety butter sauce is a classic accompaniment to rhubarb cake, you can also serve it with other sauces such as caramel sauce, vanilla custard, or whipped cream for variation.
  8. Q: How long does the butter sauce keep in the refrigerator?
    • A: The butter sauce can be stored in the refrigerator for up to one week in an airtight container. Reheat gently before serving again.

These are some of the common questions and answers related to Rhubarb Cake with Velvety Butter Sauce that may arise when making or serving this delicious dessert.