Easy 3 Ingredient Rhubarb Cake – Simple Rhubarb Dessert Recipe

Introduction

This Easy 3 Ingredient Rhubarb Cake is a simple and delightful dessert that comes together quickly with minimal ingredients. Its perfect balance of tart rhubarb and sweet cake makes it an ideal treat for any occasion, especially in spring when rhubarb is fresh and abundant.

Ingredients

• 4 cups fresh rhubarb, chopped into 1-inch pieces
• 1 box yellow cake mix (about 15.25 oz / 432 g)
• 1 cup unsalted butter, melted (227 g)

Instructions

1. Step 1: Preheat your oven to 350°F (175°C) and lightly grease a 9×13-inch baking dish to prevent sticking.
2. Step 2: Wash the rhubarb stalks thoroughly, trim the ends, and cut into 1-inch pieces to make about 4 cups. Spread the chopped rhubarb evenly across the bottom of the prepared baking dish.
3. Step 3: Sprinkle the dry yellow cake mix evenly over the rhubarb layer without mixing the ingredients together.
4. Step 4: Slowly drizzle the melted butter over the cake mix as evenly as possible to moisten the dry mix.
5. Step 5: Bake the cake in the oven for 40–45 minutes until the top is golden and slightly crisp and the rhubarb underneath is soft and juicy.
6. Step 6: Allow the cake to cool for 10–15 minutes before slicing. Serve warm or at room temperature.

Tips & Variations

• Use fresh rhubarb when possible for the best flavor and texture.
• Cut rhubarb into even pieces to ensure even cooking throughout the cake.
• Make sure to spread the melted butter thoroughly over the cake mix to avoid dry spots.
• Avoid overbaking; remove the cake once the top is golden and the edges are bubbling.
• Optional additions like 1 teaspoon vanilla extract, ½ teaspoon ground cinnamon, ½ cup chopped nuts, or 1 tablespoon lemon zest add extra flavor.

Storage

Store leftover cake in an airtight container in the refrigerator for up to 4 days. You can also wrap individual slices and freeze for up to 2 months. To reheat, warm a slice in the microwave for 20–30 seconds. The cake tastes great both warm and chilled.

How to Serve

Serve this delicious recipe with your favorite sides.

FAQs

Can I use frozen rhubarb for this cake?

Yes, frozen rhubarb works well. Measure 4 cups while still frozen and spread it directly in the baking dish without thawing to prevent excess liquid and sogginess.

What does rhubarb taste like in cake?

Rhubarb adds a natural tartness similar to green apples or cranberries. When baked, the tartness mellows, balancing with the sweet cake to create a pleasantly tangy, flavorful dessert.

Easy 3 Ingredient Rhubarb Cake – Simple Rhubarb Dessert Recipe

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4.9 from 144 reviews

This Easy 3 Ingredient Rhubarb Cake is a simple, delicious homemade dessert that combines the tartness of fresh rhubarb with the sweetness of yellow cake mix and the richness of melted butter. With minimal ingredients and fuss, it’s perfect for a comforting treat that balances flavors and textures beautifully.

• Author: luca
• Prep Time: 10 minutes
• Cook Time: 40-45 minutes
• Total Time: 50-55 minutes
• Yield: 12 servings 1x
• Category: Dessert
• Method: Baking
• Cuisine: American

Ingredients

Scale 1x2x3x

Ingredients

• 4 cups fresh rhubarb, chopped into 1-inch pieces (about 480 g)
• 1 box yellow cake mix (about 15.25 oz / 432 g)
• 1 cup unsalted butter, melted (227 g)

Instructions

1. Prepare the Oven and Baking Dish: Preheat your oven to 350°F (175°C). Lightly grease a 9×13-inch baking dish to prevent sticking and ensure easy removal of the cake after baking.
2. Prepare the Rhubarb: Wash the rhubarb stalks thoroughly and trim the ends. Cut them into 1-inch pieces until you have about 4 cups (480 g). Spread the chopped rhubarb evenly across the bottom of the baking dish, forming an even layer.
3. Add the Cake Mix: Sprinkle the dry yellow cake mix evenly over the rhubarb layer. Do not stir or mix the cake mix with the rhubarb; this layering helps create the cake’s distinct texture with juicy rhubarb pockets.
4. Add the Melted Butter: Slowly drizzle the melted butter over the entire surface of the dry cake mix layer. Aim to distribute the butter as evenly as possible so that all the dry mix becomes moist during baking, which results in a golden, slightly crispy top.
5. Bake the Cake: Place the baking dish in the preheated oven and bake for 40 to 45 minutes. The cake is done when the top turns golden and slightly crisp and the edges bubble, while the rhubarb underneath softens and becomes juicy.
6. Cool and Serve: Allow the cake to cool for 10 to 15 minutes before slicing. Serve warm or at room temperature, optionally with a scoop of vanilla ice cream or a dusting of powdered sugar.

Notes

• Use fresh rhubarb when possible for best flavor and texture; frozen rhubarb can be used directly without thawing.
• Cut rhubarb into even pieces to ensure uniform cooking.
• Make sure the melted butter is well distributed over the cake mix to avoid dry spots.
• Do not overbake; remove the cake when the top is golden and the edges bubble.
• Optional additions include vanilla extract, ground cinnamon, chopped nuts, or lemon zest for added flavor complexity.
• Store leftover cake in an airtight container in the refrigerator for up to 4 days or freeze slices wrapped individually for up to 2 months.
• Reheat leftover cake gently in the microwave for 20–30 seconds before serving.

Keywords: rhubarb cake, easy rhubarb dessert, 3 ingredient cake, simple rhubarb recipe, spring dessert, yellow cake mix recipe