It finally feels like spring has arrived when the rhubarb starts popping up in the garden. I found myself with a big bunch of those beautiful tart stalks and a serious craving for something sweet and tangy. This recipe is my absolute go-to when I want a dessert that feels special but only takes about five minutes of actual prep work.
This cake is a total magic trick because the fruit starts on top and ends up forming a luscious sauce at the bottom. It creates its own delicious glaze while it bakes, making every single bite moist and bursting with bright berry flavor. It is the kind of effortless baking that makes you look like a pro without any of the fuss.
Simple Perfection
You are going to love how this recipe handles all the hard work for you. By using a white cake mix as our base, we get to skip the tedious measuring of flour and baking powder and get straight to the good stuff. It is perfect for those busy Tuesday nights when you want a homemade treat but don’t have the energy for a complex project.
The combination of tart rhubarb and sweet strawberries is a classic for a reason. The sugar and strawberry Jello create a syrup that softens the rhubarb until it is perfectly tender. It is a wonderful balance of flavors that feels both nostalgic and fresh at the same time. Plus, you only need one main bowl for the batter, which means cleanup is a breeze.
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Strawberry Rhubarb Cake 3
- Total Time: 1 hour 5 mins
- Yield: 12 servings
Description
This effortless Strawberry Rhubarb Cake utilizes a white cake mix base to create a dessert that is both simple and sophisticated. As it bakes, the fresh fruit and strawberry gelatin transform into a luscious, sweet-tart sauce that settles at the bottom of the pan for a delightful surprise in every bite.
Ingredients
- 1 package (15.25 oz) white cake mix
- 3 large eggs
- 1/2 cup vegetable oil
- 1 cup milk
- 4 to 5 cups fresh rhubarb, cut into 1/2-inch chunks
- 1 cup fresh strawberries, diced
- 1 cup granulated sugar
- 1 small box (3 oz) strawberry gelatin powder
Instructions
- Preheat your oven to 350℉ (175℃) and grease a 9×13-inch baking dish.
- In a large mixing bowl, combine the white cake mix, eggs, vegetable oil, and milk; beat with an electric mixer on medium speed for 2 minutes until smooth.
- Pour the prepared cake batter into the greased baking dish and spread it evenly into the corners.
- In a separate medium bowl, toss together the rhubarb chunks, diced strawberries, granulated sugar, and dry strawberry gelatin powder until the fruit is well coated.
- Distribute the fruit mixture evenly over the top of the cake batter without stirring it in.
- Bake for 45 to 55 minutes until the top is golden brown and a toothpick inserted into the cake portion comes out clean.
Notes
For the best results, use a clear glass baking dish so you can see when the fruit layer is bubbling and set. Make sure to cut the rhubarb into uniform half-inch pieces so they soften perfectly at the same rate as the strawberries while baking.
- Prep Time: 15 mins
- Cook Time: 50 mins
- Category: Dessert
- Method: Baking
- Cuisine: American
The Pantry Basics
We are keeping things very approachable with ingredients you likely already have in your kitchen or can find at any local grocery store. No fancy equipment or hard-to-find items are needed here.
- White Cake Mix: Any standard box mix works perfectly as the sweet, reliable foundation.
- Large Eggs: Three eggs give the cake its structure and a lovely richness.
- Vegetable Oil: This keeps the crumb incredibly moist and tender.
- Milk: Using milk instead of water adds a bit more depth to the flavor.
- Fresh Rhubarb: You will want about four to five cups of rhubarb cut into small, half-inch chunks.
- Strawberries: Diced strawberries add a beautiful pop of red and extra sweetness.
- Granulated Sugar: This helps draw out the juices from the fruit to create that signature sauce.
- Strawberry Jello: One small box of gelatin is the secret weapon for flavor and texture.
How to Make It
Step 1: Prep the Oven and Pan
Start by preheating your oven to 350℉ (175℃). While that is warming up, grease a 9×13-inch baking dish with butter or a quick spray of non-stick cooking oil so your cake releases easily.
Step 2: Mix Your Batter
In a large mixing bowl, combine the white cake mix, milk, eggs, and vegetable oil. Use an electric mixer on medium speed for about two minutes until the batter is smooth and well combined. If you don’t have a mixer, a sturdy whisk and a little muscle will get the job done just fine.
Step 3: Fill the Dish
Pour the prepared cake batter into your greased baking dish. Use a spatula to spread it out into the corners so you have an even layer across the bottom.
Step 4: Prepare the Fruit Mixture
In a separate medium bowl, toss together your rhubarb chunks, diced strawberries, sugar, and the dry Jello powder. Stir everything together until every piece of fruit is well coated in that pink, sugary goodness.
Step 5: Top and Bake
Arrange the fruit mixture evenly over the top of the cake batter. Do not stir it in! As it bakes, the fruit will naturally sink to the bottom. Bake for 45 to 55 minutes until the top is a beautiful golden brown and a toothpick comes out clean. Let it cool for a few minutes before diving in.
Meagan’s Easy Wins
One of my favorite tricks for this cake is using a glass baking dish. It allows you to see the fruit layer bubbling at the bottom so you know exactly when it is perfectly set. If you are looking for more ways to use seasonal produce, take a look at my tips for making a cake with fruit to keep your baking fresh all year long.
Make sure you cut your rhubarb into small, uniform half-inch pieces. This helps it soften at the same rate as the strawberries, so you don’t end up with any crunchy bits in your dessert. For more inspiration on fruit-filled treats, you can also check out this strawberry rhubarb cake which uses a similar flavor profile.
Simple Swaps
If you can’t find strawberry Jello, don’t worry! Raspberry or even cherry Jello works wonderfully and gives the cake a slightly different but equally delicious tang. You can also try swapping the strawberries for blueberries or raspberries if those are what you have on hand. For a version that is packed with even more berry flavor, you might want to try my fresh strawberry cake which is a huge hit during the summer months.
Everyday Enjoyment
This cake is truly at its best when served warm with a big scoop of vanilla ice cream right on top. The cold cream melts into the warm fruit sauce and creates something truly special. If you are serving this at a family gathering, a simple dollop of whipped cream or Cool Whip also works perfectly. For another easy crowd-pleasing dessert, you should definitely try my strawberry rhubarb cake 2 recipe next time you have a gathering.
The Sweet Spot
I hope this simple cake brings a little bit of joy to your kitchen this week. It is proof that you don’t need a lot of time or fancy ingredients to make something that tastes like a dream. If you are looking for even more berry-filled goodness, my strawberry cake 3 is another wonderful option for your baking rotation. I would love to see your creations, so please share them with me!
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