Easy 3 Ingredient Rhubarb Cake – Simple Rhubarb Dessert Recipe
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.
- 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
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
- 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.
- 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.
- 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.
- 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.
- 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.
- 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
