7-Up Cake Recipe With Cake Flour: Citrusy Lime Frosting That Pops

This 7-Up cake recipe with cake flour delivers a light, tender crumb with a signature citrusy brightness that makes every slice unforgettable. The secret lies in replacing some liquid with 7-Up soda, which infuses the batter with effervescent lime notes while keeping the texture impossibly moist.

I perfected this version after testing countless variations—this one consistently delivers that perfect balance of fluffy layers and vibrant flavor.

The cake flour creates an ultra-fine, delicate crumb that holds up beautifully to the tangy frosting, while the soda adds a subtle fizz that keeps the texture light. Baking at 350°F for 25-30 minutes ensures even doneness, and the frosting—made with lime zest and powdered sugar—elevates the citrus experience.

This recipe is designed for home bakers who want restaurant-quality results without the fuss.

What you’ll end up with is a cake that’s golden, moist, and bursting with lime essence in every bite, topped with a bright, creamy frosting that makes it look as good as it tastes.

The soda’s effervescence lingers just enough to remind you of summer sips, while the cake flour ensures a texture that’s neither too dense nor too crumbly. Perfect for birthdays, brunch, or just because—this cake is a crowd-pleaser.

Ready to bake? The recipe includes step-by-step instructions for mixing, baking, and frosting, plus tips for adjusting the frosting consistency or adding a citrus glaze. Let’s get started on a cake that’s as fun to make as it is to eat.

Ingredients for 7 up cake recipe with cake flour

Cake flour and 7-Up soda create a light, citrusy cake with restaurant-quality texture.

The cake flour is non-negotiable—it creates that signature tender crumb that regular flour can’t match. Grab Bob’s Red Mill or Gold Medal if you’re shopping, as they’re reliable brands. For the 7-Up, use the classic lime flavor, not the diet version. The butter should be room temperature—press it gently to check. If it leaves a dent, it’s ready. The vanilla extract matters too; imitation won’t give you that same depth of flavor. Pro tip: measure your dry ingredients first, then add the wet ones to avoid a mess.

No cake flour? Substitute 1.5 cups all-purpose flour minus 2 tbsp—but expect a slightly denser texture. 7-Up hard to find? Swap for Sprite or lemon-lime soda in a pinch. The lime zest can be dried if needed, but fresh is best—Trader Joe’s usually has great organic limes. For the frosting, if you don’t have heavy cream, whipped coconut cream works for a dairy-free option. The powdered sugar should be sifted to avoid lumps—Domino is a solid brand for this. If your frosting is too thick, add 1 tsp lemon juice at a time until it reaches a spreadable consistency.

Store the cake in an airtight container at room temperature for up to 3 days—it actually tastes better the next day as the flavors meld. The frosting keeps for 2 days in the fridge, but bring it to room temperature before spreading. For longer storage, freeze the unfrosted cake layers for up to 3 months. Thaw at room temperature before frosting. The lime zest can be prepped ahead and stored in the freezer for up to 6 months—just grind it fresh when ready to use for maximum brightness.

Step-by-step instructions for lime frosting 7-Up cake

Here’s how to create a light, citrusy cake with a bright frosting that complements the soda’s effervescence.

In a large mixing bowl, combine the 1 cup unsalted butter (room temperature) and 2 cups granulated sugar. Using an electric mixer on medium speed, beat for 3-5 minutes until the mixture becomes light and fluffy. You’ll notice the mixture nearly doubles in volume and turns pale yellow—this incorporates air that helps create the cake’s tender crumb.

Here’s the thing—don’t rush this step. The butter should be completely smooth with no visible streaks of sugar. If you press your finger into the mixture, it should spring back slowly rather than immediately. This ensures proper aeration for a light cake texture.

Add the 2 whole large eggs, one at a time, mixing well after each addition. After both eggs are incorporated, add the 2 teaspoons vanilla extract and mix for an additional 30 seconds. The mixture should be thick and smooth, though slightly ribbony in texture.

I always add the eggs one at a time to prevent cracking and to ensure even incorporation. If you add both eggs at once, you risk creating air pockets that can lead to uneven baking. The vanilla extract should be fully distributed—you should smell it throughout the mixture.

In a separate bowl, whisk together the 1.5 cups cake flour, 1.5 cups all-purpose flour, 2 teaspoons baking powder, and 0.5 teaspoon salt. With the mixer on low speed, gradually add the dry ingredients to the butter mixture, alternating with the 1 cup chilled 7-Up soda. Start and end with the dry ingredients.

Add the soda in three separate additions, mixing just until combined after each addition. This prevents the cake from becoming dense. The batter should be smooth and slightly thin—similar to pancake batter. If it looks too thick, add 1 tablespoon more soda. The batter should be light and airy, with no visible streaks of flour.

Preheat your oven to 350°F. Grease and flour two 8-inch round cake pans or line them with parchment paper. Divide the batter evenly between the pans and smooth the tops. Bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean and the edges pull away from the pan.

I know it’s tempting to open the oven door to check, but resist! Opening the oven too early can cause the cake to sink. The cake is done when it springs back slowly when gently pressed in the center and the top is golden brown.

In a medium bowl, combine the 3 cups powdered sugar, 1 tablespoon fresh lime zest, 0.5 cup cold heavy cream, and 1 tablespoon lemon juice. Beat with an electric mixer on medium speed until smooth and creamy. If the frosting is too thick, add 1-2 teaspoons water or 1 teaspoon lemon juice to reach a spreadable consistency.

The frosting should be light and airy, with a bright citrus aroma. The lime zest should be finely grated—no visible pieces. If you taste it at this stage, it should be sweet with a sharp, refreshing citrus punch. This frosting is designed to complement the cake’s subtle soda flavor with a vibrant citrus note.

Allow the cakes to cool completely in their pans for 10 minutes, then transfer to a wire rack to cool for another 20 minutes. Once cooled, level the tops if necessary, then place one cake layer on a serving plate. Spread a generous layer of the lime frosting over the top, then place the second cake layer on top.

Frost the entire cake, creating a smooth finish. For extra flair, pipe additional frosting around the edges or create a simple rosette on top. Serve immediately for the best texture and flavor combination. The cake should be moist with a tender crumb, while the frosting provides a refreshing citrus contrast that makes each bite exciting.

Flavor customization for these flavors

Citrus Variations

Swap lime zest for lemon zest (use 1 tbsp) and add ½ tsp orange extract to the batter for a sweeter, tropical twist. The frosting stays the same, but the flavor profile becomes more complex with bright citrus layers.

I’ve found this works especially well when using fresh Meyer lemons for a subtly floral note. 🌸

Spiced Frosting Twist

Infuse the frosting with warmth by adding ¼ tsp ground cinnamon and ⅛ tsp nutmeg directly to the powdered sugar before whipping. The spices complement the soda’s effervescence without overpowering it.

For extra depth, replace 1 tbsp lemon juice with 1 tbsp orange liqueur (like Cointreau) for a sophisticated touch. 🍊