Name: Strawberry Sheet Cake with Rhubarb Swiss Meringue Frosting Recipe
Prep time: 20 min
Cook time: 40 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 2 cups sliced strawberries (from 1/2 pound strawberries); 1/4 cup white granulated sugar (divided into 2 tablespoons each); 1 cup diced rhubarb (from 4 to 5 shortish stalks); 2 3/4 cups cake flour (plus more for dusting pans); 2 1/2 teaspoons baking powder; 1 teaspoon salt; 1 cup unsalted butter; 1 3/4 cups white granulated sugar; 3/4 cup milk; 6 large egg whites; 2 teaspoons pure vanilla extract or 1/4 teaspoon vanilla paste; 3 drops red food coloring (optional, for strawberry puree); 3 large egg whites; 3/4 cup white granulated sugar; 1 cup unsalted butter (at room temperature); 1/4 cup rhubarb puree; 2 to 3 drops red food coloring (optional)

Jump to Recipe· 3.8 from 61 reviews

If you are on the hunt for a show-stopping dessert that bursts with vibrant flavor and irresistible texture, look no further than this Strawberry Sheet Cake with Rhubarb Swiss Meringue Frosting Recipe. This cake effortlessly combines the natural sweetness of roasted strawberries with the tangy brightness of rhubarb in a tender, moist sheet cake base, all topped with a silky Swiss meringue frosting that boasts subtle tartness and creamy richness. It’s the perfect crowd-pleaser for any occasion, guaranteed to bring smiles and satisfy your fruit and frosting cravings in one luscious bite.

Ingredients You'll Need

The image shows two groups of strawberries on a white marbled surface. The top group is finely diced strawberries with a mix of red and pink shades, scattered loosely in a small pile. Below this, there is a larger pile of strawberry halves and quarters, displaying vibrant red skin and lighter inner flesh, sprinkled with white granulated sugar. The contrast between the two groups is clear with the smaller, more textured pieces above and the larger, juicier strawberry pieces below. The overall scene is bright and fresh. photo taken with an iphone --ar 4:5 --v 7

To create this delightful Strawberry Sheet Cake with Rhubarb Swiss Meringue Frosting Recipe, you only need a handful of simple, fresh ingredients that work together beautifully to build layers of flavor. Each component plays an essential role—from the juicy strawberries and rhubarb delivering bright fruitiness to the cake flour and butter providing a tender texture and rich crumb.

2 cups sliced strawberries: Fresh and ripe, these give you that classic strawberry sweetness and vibrant color.

¼ cup white granulated sugar (divided): Balances the tartness of rhubarb and enhances the natural fruit flavors.
1 cup diced rhubarb: Adds a tangy punch and unique depth to both cake and frosting.
Pinch of salt: Locks in sweetness and elevates all the flavors.

3 drops red food coloring (optional): For that extra pop of rosy hue without overpowering the cake.
2 ¾ cups cake flour: Milled finely to keep the cake light and tender—don’t forget to dust your pans!
2 ½ teaspoons baking powder: Gives the cake a delicate lift and airy crumb.

1 teaspoon salt: Helps balance flavor and enhances the baking powder’s effectiveness.
1 cup unsalted butter: Richness in every bite, critical for buttery softness.
1 ¾ cups white granulated sugar: Sweetens the cake and assists with browning the crust.

¾ cup milk: Adds moisture and contributes to a tender crumb.
6 large egg whites: Whip the cake batter into a tender, structured sponge.
2 teaspoons pure vanilla extract or ¼ teaspoon vanilla paste: Infuses gentle warmth and aromatic notes.

3 large egg whites (for frosting): The heart of the Swiss meringue frosting for luscious fluffiness.
¾ cup white granulated sugar (for frosting): Sweetens and stabilizes the meringue.
1 cup unsalted butter (at room temperature): Creates that smooth, creamy base for the frosting.

¼ cup rhubarb puree: Adds a tart, fresh flavor that makes the frosting sing.
2 to 3 drops red food coloring (optional for frosting): Gives the frosting a beautiful, blush pink touch.

How to Make Strawberry Sheet Cake with Rhubarb Swiss Meringue Frosting Recipe

Step 1: Roasting the Strawberries and Rhubarb

Start by heating your oven to 350 degrees F, then prepare a parchment-lined baking sheet. Separate your sliced strawberries on one side and diced rhubarb on the other, sprinkling half your sugar evenly over each fruit. This roasting step softens the fruit and brings out concentrated natural sugars while preserving their bright flavors. After about 10 minutes in the oven, allow them to cool slightly. Once ready, pulse the strawberries into a smooth puree and do the same with the rhubarb. Adding a few drops of red food coloring can heighten their lovely color but is optional.

Step 2: Preparing the Cake Batter

Keep the oven temperature the same and grease a 13x9-inch pan to ensure easy release. In a medium bowl, whisk together your cake flour, baking powder, and salt for the perfect dry base. In your stand mixer, cream the butter and sugar until light and fluffy—this is key for an airy cake. Next, mix together milk, egg whites, vanilla, and half of the strawberry puree; these wet ingredients provide moisture and flavor. Slowly alternate adding dry and wet mixtures to the butter/sugar blend, mixing until just combined and smooth. Pour your batter into the prepared pan for baking.

Step 3: Baking the Cake

Bake the batter for approximately 25 minutes, testing with a skewer to ensure it comes out clean—your cue that the cake is perfectly baked through. Once out of the oven, let it cool in the pan briefly before inverting it onto a rack to cool completely. This cooling phase is essential so the cake can set up nicely, and it opens the door to frosting it without melting.

Step 4: Making the Rhubarb Swiss Meringue Frosting

While the cake cools, prepare a double boiler by simmering a saucepan with a few inches of water and placing a bowl on top. Combine egg whites and sugar in the bowl and whisk gently over the warm water until the sugar dissolves and the temperature reaches 140 degrees F. Transfer this mixture to your stand mixer, whisking until a voluminous, glossy meringue forms. Switch to the paddle attachment and slowly add butter cubes, blending until your frosting is smooth and shiny. Stir in rhubarb puree and optional food coloring for that perfect balance of sweet and tangy with a gorgeous pink blush.

Step 5: Frosting and Decorating the Cake

Once the cake is completely cool, generously spread the rhubarb Swiss meringue frosting on top using a spatula for a smooth finish. Give it some whimsical swoops or swirls that catch the eye. Top with colorful sprinkles or fresh fruit if you want to amp up the festive feel. This final touch transforms the cake into a centerpiece worthy of any celebration.

How to Serve Strawberry Sheet Cake with Rhubarb Swiss Meringue Frosting Recipe

A rectangular cake sits on a silver tray on a white marbled surface, frosted with a thick layer of light pink icing that has a soft, slightly swirled texture. The cake is cut into several square pieces, two of which are removed and placed on white plates nearby. Each piece is decorated with small, colorful sprinkles in red, blue, green, yellow, and white scattered across the pink icing. A small white bowl filled with more sprinkles sits on the right side of the tray. A soft beige cloth with fringed edges is draped casually at the top left corner of the image. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

Fresh sliced strawberries or thin rhubarb ribbons look stunning set atop the frosting, reinforcing the cake's fresh fruit theme. Edible flower petals or a scattering of toasted almonds can also add an elegant texture and a pop of color. Little details like these make serving this cake even more delightful.

Side Dishes

This cake pairs beautifully with a simple dollop of whipped cream or a scoop of vanilla bean ice cream to complement its fruitiness without overpowering the delicate frosting. Lightly brewed green or chamomile tea brings a soothing warmth that balances the sweetness perfectly.

Creative Ways to Present

Try serving the cake as individual squares layered with extra strawberry slices between cake and frosting for an impressive plated dessert. Alternatively, cut into finger-sized bars and serve on rustic wooden boards for a casual gathering that’s still elegant. Wrapping slices in parchment paper tied with twine also makes charming take-home favors for guests.

Make Ahead and Storage

Storing Leftovers

You can store your leftover Strawberry Sheet Cake with Rhubarb Swiss Meringue Frosting Recipe covered tightly at room temperature for up to two days. For longer freshness, wrap the cake securely and keep it refrigerated where it will last up to four days. Just be sure to bring it to room temperature before serving for the best flavor and texture.

Freezing

This cake freezes well for up to one month. Freeze it unfrosted for the best texture, wrapped tightly in plastic wrap and foil. When you're ready to serve, thaw it overnight in the refrigerator and frost it fresh. While the Swiss meringue frosting can be frozen too, it’s best when made fresh.

Reheating

Since this cake is best served cool or at room temperature, there’s no need to reheat before eating. If you prefer it slightly warm, a quick 10-15 second zap in the microwave per slice can soften the cake just a touch, but avoid overheating or the frosting may melt.

FAQs

Can I use frozen strawberries and rhubarb for this recipe?

While fresh fruit is preferred for the best texture and flavor, you can use frozen strawberries and rhubarb. Just be sure to thaw and drain any excess liquid before proceeding to avoid soggy results.

Is there a gluten-free option for this sheet cake?

Yes! You can substitute the cake flour with a high-quality gluten-free flour blend designed for cakes, but the texture might be slightly denser. Adding a teaspoon of xanthan gum can help mimic the elasticity of gluten.

Can I use whole eggs instead of egg whites?

The egg whites lighten the cake and are crucial for the Swiss meringue frosting, which requires them for its fluffy texture. Using whole eggs will change the structure and isn’t recommended for this particular recipe.

What is Swiss meringue frosting and why use it here?

Swiss meringue frosting is made by gently heating egg whites and sugar, then whipping them into a stable, glossy meringue before adding butter. It’s silky, less sweet, and holds up well compared to other frostings. Its subtle tang from rhubarb perfectly complements the sweet, fruity cake.

Can this cake be made into cupcakes?

Absolutely! Just adjust baking time to around 18-20 minutes, and frost once the cupcakes are cool. It’s a fun way to make this recipe party-friendly if you want individual servings.

Final Thoughts

This Strawberry Sheet Cake with Rhubarb Swiss Meringue Frosting Recipe is one of those desserts you’ll find yourself excited to bake again and again. The harmonious dance of roasted strawberry sweetness paired with tart rhubarb, all wrapped in tender cake and topped with dreamy frosting, is truly unforgettable. I wholeheartedly encourage you to try it yourself—it’s a beautiful way to celebrate seasonal fruit and make your dessert table shine!

Strawberry Sheet Cake with Rhubarb Swiss Meringue Frosting Recipe

Ingredients You'll Need

How to Make Strawberry Sheet Cake with Rhubarb Swiss Meringue Frosting Recipe