This delightful rhubarb cake is a perfect blend of tart and sweet, making it an ideal dessert for any occasion. The tangy rhubarb pairs beautifully with the moist, tender cake, creating a treat that is sure to impress your family and friends.
If you don't usually have rhubarb or buttermilk in your kitchen, you'll need to pick these up at the supermarket. Rhubarb is a tart vegetable often used in desserts, and buttermilk adds a subtle tang and helps keep the cake moist. Both can usually be found in the produce and dairy sections, respectively.

Ingredients for Rhubarb Cake Recipe
Rhubarb: A tart vegetable that adds a unique flavor to the cake.
Sugar: Sweetens the cake and balances the tartness of the rhubarb.
Flour: Provides structure to the cake.
Baking soda: Helps the cake rise and become fluffy.
Salt: Enhances the flavors of the other ingredients.
Buttermilk: Adds moisture and a slight tang to the cake.
Egg: Binds the ingredients together and adds richness.
Vanilla extract: Adds a warm, sweet flavor to the cake.
Technique Tip for Making Rhubarb Cake
When preparing the rhubarb for this cake, ensure that you chop it into uniform pieces. This will help the rhubarb cook evenly throughout the cake. Additionally, if your rhubarb is particularly tart, you can toss the pieces in a bit of sugar before folding them into the batter. This will help balance the flavors and add a touch of sweetness to each bite.
Suggested Side Dishes
Alternative Ingredients
chopped rhubarb - Substitute with chopped strawberries: Strawberries provide a similar tartness and texture, making them a great alternative in cakes.
sugar - Substitute with honey: Honey adds a natural sweetness and moisture, though it may slightly alter the flavor profile.
flour - Substitute with almond flour: Almond flour is a gluten-free option that adds a nutty flavor and a moist texture to the cake.
baking soda - Substitute with baking powder: Use three times the amount of baking powder to achieve a similar leavening effect.
salt - Substitute with sea salt: Sea salt can be used in the same quantity and provides a slightly different mineral content.
buttermilk - Substitute with yogurt: Yogurt has a similar tangy flavor and consistency, making it a good replacement for buttermilk.
large egg - Substitute with flaxseed meal and water mixture: Mix one tablespoon of flaxseed meal with three tablespoons of water to replace one egg, suitable for vegan diets.
vanilla extract - Substitute with almond extract: Almond extract offers a different but complementary flavor that can enhance the overall taste of the cake.
Alternative Recipes Similar to Rhubarb Cake
How to Store or Freeze Your Cake
- Allow the rhubarb cake to cool completely before storing. This prevents condensation, which can make the cake soggy.
- Wrap the cake tightly in plastic wrap or aluminum foil to keep it fresh. Ensure there are no exposed areas.
- For added protection, place the wrapped cake in an airtight container or a resealable plastic bag.
- Store the cake at room temperature for up to 2 days. If you need to keep it longer, refrigerate it for up to a week.
- To freeze, first wrap the cake in plastic wrap and then in a layer of aluminum foil. This double wrapping helps prevent freezer burn.
- Label the wrapped cake with the date to keep track of its freshness.
- Place the wrapped cake in a freezer-safe container or a heavy-duty freezer bag for extra protection.
- Freeze the cake for up to 3 months. When ready to enjoy, thaw it in the refrigerator overnight.
- For the best texture, allow the cake to come to room temperature before serving. This ensures the rhubarb retains its delightful tartness and the cake remains moist.
How to Reheat Leftovers
Oven Method: Preheat your oven to 300°F (150°C). Place the leftover rhubarb cake on a baking sheet and cover it loosely with aluminum foil to prevent it from drying out. Heat for about 10-15 minutes, or until warmed through. This method helps maintain the cake's original texture and flavor.
Microwave Method: Place a slice of rhubarb cake on a microwave-safe plate. Cover it with a damp paper towel to keep it moist. Microwave on medium power for 20-30 seconds. Check the cake and continue to heat in 10-second intervals if necessary. Be cautious not to overheat, as this can make the cake rubbery.
Steaming Method: If you have a steamer, this is a gentle way to reheat your rhubarb cake. Place the cake on a heatproof plate and set it in the steamer. Steam for about 5-7 minutes. This method helps retain moisture and keeps the cake soft.
Toaster Oven Method: Preheat your toaster oven to 300°F (150°C). Place the rhubarb cake on a piece of aluminum foil or a small baking tray. Heat for about 10 minutes, checking frequently to ensure it doesn't dry out. This method is great for reheating smaller portions.
Skillet Method: For a quick and slightly crispy edge, heat a non-stick skillet over low heat. Place a slice of rhubarb cake in the skillet and cover with a lid. Heat for about 2-3 minutes on each side. This method adds a delightful texture contrast to the cake.
Essential Tools for Making Rhubarb Cake
Oven: Used to bake the cake at a consistent temperature of 350°F (175°C).
Mixing bowl: One for combining the dry ingredients and another for the wet ingredients.
Measuring cups: Essential for accurately measuring the flour, sugar, and buttermilk.
Measuring spoons: Used to measure the baking soda, salt, and vanilla extract.
Whisk: Useful for mixing the wet ingredients together smoothly.
Spatula: Handy for folding the chopped rhubarb into the batter.
Baking pan: The container in which the batter is poured and baked.
Toothpick: Used to check if the cake is done by inserting it into the center and seeing if it comes out clean.
Cooling rack: Allows the cake to cool evenly after baking.
Knife: For chopping the rhubarb into small pieces.
Cutting board: Provides a safe surface for chopping the rhubarb.
How to Save Time on Making This Cake
Pre-measure ingredients: Measure and prepare all ingredients before starting to save time during the baking process.
Use a food processor: Quickly chop the rhubarb using a food processor instead of doing it by hand.
Room temperature ingredients: Ensure the buttermilk and egg are at room temperature for easier mixing.
One-bowl method: Combine all wet ingredients in one bowl and all dry ingredients in another to streamline the process.
Preheat the oven early: Start preheating your oven before you begin mixing to save time.
Rhubarb Cake Recipe
Ingredients
Main Ingredients
- 2 cups chopped rhubarb
- 1 cup sugar
- 1 cup flour
- 1 teaspoon baking soda
- ½ teaspoon salt
- 1 cup buttermilk
- 1 large egg
- 1 teaspoon vanilla extract
Instructions
- Preheat your oven to 350°F (175°C).
- In a mixing bowl, combine the flour, baking soda, and salt.
- In another bowl, mix the buttermilk, egg, and vanilla extract.
- Combine the wet and dry ingredients, then fold in the chopped rhubarb.
- Pour the batter into a greased baking pan.
- Bake for 45 minutes or until a toothpick comes out clean.
- Let the cake cool before serving.
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