Desserts
This 7-Up cake recipe with coconut pineapple frosting transforms a childhood favorite into a vibrant, tropical party dessert that always disappears first. The secret lies in the cake's tender crumb—achieved through buttermilk and a touch of baking soda—paired with a frosting so light and fluffy it melts on your tongue. My first attempt had a dense texture, but adjusting the leavening and baking time nailed that perfect balance between moist and airy.
The coconut pineapple frosting is where the magic happens—creamy coconut milk and condensed milk create a velvety base, while pineapple purée adds a bright, tangy contrast that cuts through the cake's richness. I developed this frosting after struggling to find one that wasn't too sweet or overly thick, and now it's the highlight of any celebration. The recipe uses simple pantry staples, so you won't need to hunt for specialty ingredients.
What you'll end up with is a two-layer cake that's tall enough to impress but light enough to eat without feeling weighed down. The frosting swirls beautifully, creating a stunning presentation that tastes even better than it looks. Each bite delivers the nostalgic flavor of 7-Up with a tropical twist that makes it feel fresh and exciting—ideal for birthdays, showers, or just because.
Serve it with fresh pineapple slices on top or a sprinkle of toasted coconut flakes for extra texture. This cake holds its shape beautifully, so it's perfect for cutting and serving at gatherings. The frosting stays firm enough to pipe but soft enough to spread, giving you options for decoration. Let's get baking!
Ingredients for 7 up cake recipe with coconut pineapple frosting
Simple pantry staples and a few tropical touches make this nostalgic cake shine.
| Ingredient | Amount | Notes |
|---|---|---|
| All-Purpose Flour 🌾 | 3 cups | Sifted for light texture |
| Granulated Sugar 🍚 | 2 cups | White sugar preferred |
| Buttermilk 🥛 | 1 cup | Room temperature for best results |
| Vegetable Oil 🫒 | 1 cup | Light or neutral oil |
| Baking Soda 🧂 | 1 tsp | Freshly measured |
| Salt 🧂 | ½ tsp | Kosher or sea salt |
| Vanilla Extract 🌿 | 2 tsp | Pure vanilla preferred |
| 7-Up Soda 🥤 | ½ cup | Chilled for mixing |
| Sweetened Coconut Milk 🥥 | 13 ½ oz | Full-fat for creaminess |
| Condensed Milk 🥛 | 14 oz | Sweetened condensed |
| Pineapple Purée 🍍 | ½ cup | Fresh or canned (no sugar added) |
| Unsalted Butter 🧈 | 1 cup | Room temperature for frosting |
| Powdered Sugar 🍚 | 3 cups | Sifted for smooth frosting |
| Toasted Coconut Flakes 🥥 | ½ cup | For garnish |
The flour and sugar are your foundation—King Arthur or Gold Medal brands work best for that tender crumb. Buttermilk adds moisture without heaviness, so don't substitute sour milk—it won't have the same tang. For the tropical twist, Trader Joe's has the best pineapple purée (no sugar added), but fresh is ideal if you're feeling fancy. The coconut milk needs to be full-fat for that velvety frosting—Aroy-D or Thai Kitchen are my go-tos, but any canned version works in a pinch. And that 7-Up? Use the real thing—the soda's citrus notes are what make this taste like childhood memories.
No buttermilk? Mix 1 cup milk + 1 tbsp vinegar, let sit 5 minutes. Fresh pineapple purée unavailable? Canned crushed pineapple (drained) works, but add a splash of lemon juice to brighten it up. The frosting can be made 2 days ahead—just store it in the fridge and re-whip before using. For extra flair, mix in 1 tsp lime zest with the powdered sugar. And if you're worried about the frosting being too sweet, reduce the condensed milk by 2 oz—trust me, it's still delicious.
This cake keeps beautifully—3 days at room temp covered loosely, or 1 week refrigerated in layers separated by parchment. The frosting? Up to 5 days in the fridge, though it softens slightly. For serving, pipe swirls or spread evenly—both look stunning. Garnish with toasted coconut flakes right before serving so they stay crisp. Leftovers? Slice and freeze for up to 3 months—just thaw at room temp before serving.
Why You'll Love This Recipe
- No Mixer Needed: I swear by this recipe when I’m in a rush—just stir, pour, and bake. The buttermilk keeps it tender without needing to cream butter and sugar, and the oil makes it moist even if I forget to measure perfectly.
- Tropical Comfort: That pineapple frosting with coconut? It’s like a vacation in every bite. The tangy 7up flavor in the cake cuts through the sweetness, and the coconut gives it a creamy, almost tropical vibe that feels special without being fussy.
- Party Ready: Honestly, this cake looks impressive enough for a birthday but takes less effort than store-bought. The layers hold up well, and the frosting stays smooth—no melting disasters here. I’ve used it for potlucks, showers, and even just because.
- Budget-Friendly Luxury: I make this all the time because it’s cheap but tastes like a splurge. The ingredients are basic, and the frosting uses canned pineapple (no fancy purées needed). Leftovers? They last days, and I still reach for seconds.
Step-by-step instructions for 7-Up cake with coconut pineapple frosting
Here's how to bake this crowd-pleasing cake with a tropical twist.
Mix the Cake Batter
Preheat your oven to 350°F and grease two 9-inch round cake pans. Line the bottoms with parchment paper for easy removal. In a large mixing bowl, combine the 3 cups all-purpose flour, 2 cups granulated sugar, 1 tsp baking soda, and 0.5 tsp salt. Whisk until evenly distributed.
In a separate bowl, mix the 1 cup buttermilk, 1 cup vegetable oil, 2 tsp vanilla extract, and 0.5 cup chilled 7-Up soda. Pour this wet mixture into the dry ingredients and stir just until combined—don't overmix. The batter will be thin, almost like pancake batter, but that's exactly what we want for that classic 7-Up cake texture.
Bake the Cake Layers
Divide the batter evenly between the prepared cake pans. Bake for 25-30 minutes or until a toothpick inserted into the center comes out clean. The cakes should be golden brown on top and spring back when gently pressed in the center. Let them cool in the pans for 10 minutes before transferring to a wire rack to cool completely.
Here's the thing—don't skip the cooling step. Warm cakes will crumble when you try to frost them, and you want that smooth, professional finish. I like to cool mine completely before assembling, which takes about 1 hour total. Patience here ensures your cake holds together beautifully.
Prepare the Coconut Pineapple Frosting
In a medium saucepan, combine the 13.5 oz sweetened coconut milk, 14 oz condensed milk, and 0.5 cup pineapple purée. Cook over medium-low heat, stirring constantly, for 8-10 minutes until the mixture thickens slightly and reaches 160°F. Remove from heat and let it cool completely.
Once cooled, beat the 1 cup unsalted butter until smooth, then gradually add the 3 cups powdered sugar while mixing on low speed. Add the cooled coconut mixture and blend until smooth and creamy. Taste and adjust sweetness if needed—you can add more powdered sugar if desired, but this recipe is perfectly balanced for most tastes.
Assemble and Frost the Cake
Place one cake layer on a serving plate. Spread about 1 cup of the coconut pineapple frosting evenly over the top. Repeat with the second layer. Frost the entire cake, covering all sides completely. I like to use a spatula to smooth out any rough spots and create clean edges.
For that extra party touch, sprinkle the top with the 0.5 cup toasted coconut flakes. You can also pipe additional frosting around the edges for a more decorative look. Chill the cake in the refrigerator for at least 30 minutes before serving to help it set properly.
Pro Tips For Making 7 Up Cake Recipe With Coconut Pineapple Frosting
- Measure Buttermilk Precisely: Use a liquid measuring cup for the buttermilk—this cake’s structure depends on it. I learned this the hard way when I eyeballed it once and ended up with a dense, crumbly mess instead of that light, airy texture.
- Don’t Overmix the Batter: Stop mixing as soon as the flour disappears—overworking it turns the cake tough. The buttermilk and baking soda need just enough to blend, not to develop gluten. Two minutes max with a mixer, or stir by hand until just combined.
- Test for Doneness Early: The toothpick test works, but this cake’s thick batter can fool you—check at 35 minutes, not 40. If it’s still slightly sticky, give it 5 more minutes; overbaking dries it out fast, especially with the oil.
- Chill the Frosting Base: Whip the coconut pineapple frosting ingredients (condensed milk, butter, cream cheese) over a bowl of ice—it makes piping easier and prevents melting. I used to rush this and ended up with a runny, sad mess on top.
Pro cooking tips for this recipe
Batter Consistency
The secret to that perfect 7-Up cake texture is a thin, almost pancake-like batter—don't fight it! The buttermilk and 7-Up soda create air pockets that make the cake light and tender. I use a hand mixer on low speed to combine wet and dry ingredients just until combined, about 30 seconds. Overmixing develops gluten, which makes the cake tough. If your batter looks too thick, add 1-2 tablespoons of cold water to loosen it up. 🌬️
Baking Time Mastery
Every oven behaves differently, so I recommend baking your cakes for 25 minutes, then checking for doneness with a toothpick. If it comes out clean but the edges look underbaked, add 2-3 more minutes. The cakes should spring back when gently pressed in the center. Pro tip: Place a pan of hot water on the lower oven rack during baking—this creates steam that keeps the cake moist. I swear by this trick for that classic 7-Up cake crumb.
Frosting Temperature Control
The coconut pineapple frosting needs to be at room temperature when you assemble the cake, but not too soft. If it's too warm, it'll melt and slide off. I let mine cool completely after cooking, then chill the bowl in the fridge for 10 minutes before whipping with the butter. For extra stability, add 1 tsp cornstarch to the powdered sugar—it helps thicken the frosting slightly without altering the flavor. 🥥
Layer Assembly Tricks
When stacking your layers, place a thin layer of frosting (about ¼ cup) between them to act as "glue." This prevents crumbling when you cut the cake. I use a serrated knife to level the tops of my cakes before frosting—it makes for a cleaner finish. For that swirled look, pipe frosting onto the cake, then use a long spatula to create gentle swirls. Work quickly so the frosting doesn't set before you're done.
Chilling for Success
Never skip the 30-minute chilling step before serving! This lets the frosting set properly and prevents messy slides. If you're in a hurry, pop the cake in the fridge for 15 minutes—just don't leave it there too long or the frosting will get grainy. For extra stability, I sometimes brush the cake layers with a simple syrup (equal parts sugar and water, heated until dissolved) before frosting. It adds moisture and helps the frosting adhere better. ✨
Troubleshooting Tips
If your cake layers crack while baking, it's usually from too much leavening or overmixing. Next time, reduce the baking soda to ½ tsp and mix just until combined. For frosting that's too thick, add 1-2 tablespoons of coconut milk and whip again. If it's too runny, chill it for 10 more minutes before using. And if your coconut flakes lose their crunch? Toast them fresh right before serving—350°F for 3-4 minutes does the trick! 💡
Nutrition facts
Frequently asked questions
Can I substitute regular milk for the buttermilk in this cake?
Not recommended! Buttermilk's tangy acidity reacts with the baking soda to create that signature light, airy texture. For a quick fix, mix 1 cup milk + 1 tbsp vinegar or lemon juice, let sit 5 minutes until slightly thickened. Never use sour milk—it won't have the same chemical reaction.
Why does my frosting taste too sweet?
The coconut pineapple frosting is designed to balance the cake's subtle citrus notes. If it's too sweet, reduce the condensed milk by 2 oz next time. For extra tang, add 1 tsp lime zest to the powdered sugar. The pineapple purée already provides natural sweetness, so adjust gradually.
How do I make this cake gluten-free?
Replace the all-purpose flour with a 1:1 gluten-free baking flour blend (like Bob's Red Mill). Add ½ tsp xanthan gum to help bind the crumb. The frosting remains unchanged. Note: Gluten-free cakes often need 2-3 extra minutes in the oven and may crumble more easily—chill before slicing.
Can I make this cake in a single layer instead of two?
Yes! Use a 10-inch round pan and reduce baking time to 22-25 minutes. The frosting amount stays the same—just spread it thicker. Single-layer cakes work beautifully for smaller gatherings or as individual portions. For extra height, pipe frosting around the edges to create a "wall" effect.
What's the best way to store leftovers?
Wrap the whole cake tightly in plastic wrap, then place in an airtight container. It stays fresh for 3 days at room temperature or 1 week refrigerated. For longer storage, freeze layers separately with parchment between them—thaw overnight in the fridge before serving. Frosting can be made 2 days ahead and stored separately.