7up cake is a vintage Southern favorite known for its moist texture and subtle citrus tang, achieved by incorporating lemon-lime soda directly into the batter. This unique twist on a traditional white cake creates a light, fluffy dessert that pairs wonderfully with cream cheese frosting or a simple glaze.
Ingredients
- 2 cups all-purpose flour
- 1 ½ cups granulated sugar
- 1 teaspoon baking soda
- ½ teaspoon salt
- ½ cup (1 stick) unsalted butter, softened
- 2 large eggs
- 1 cup 7up (or any lemon-lime soda), at room temperature
- ½ cup buttermilk, at room temperature
- 2 teaspoons vanilla extract
- Zest of 1 lemon (optional for extra citrus flavor)
- For the frosting:
- 8 oz cream cheese, softened
- ½ cup (1 stick) unsalted butter, softened
- 4 cups powdered sugar, sifted
- 1 teaspoon vanilla extract
- 1-2 tablespoons milk or cream (optional, for desired consistency)
Instructions
- Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan or two 8-inch round cake pans.
- In a large mixing bowl, whisk together the flour, sugar, baking soda, and salt until evenly combined.
- Add the softened butter to the dry ingredients. Using an electric mixer on medium speed, beat until the mixture is crumbly and well incorporated, about 2 minutes.
- In a separate bowl, whisk together the eggs, 7up, buttermilk, vanilla extract, and lemon zest (if using).
- Gradually pour the wet ingredients into the dry ingredients while mixing on low speed. Beat until the batter is smooth and no lumps remain, about 2-3 minutes. The batter will be somewhat thin due to the soda.
- Pour the batter evenly into the prepared pan(s) and smooth the top with a spatula.
- Bake in the preheated oven for 30-35 minutes (for 9×13 pan) or 25-30 minutes (for 8-inch rounds), or until a toothpick inserted into the center comes out clean or with just a few moist crumbs attached.
- Remove the cake from the oven and allow it to cool completely in the pan on a wire rack before frosting.
- To make the frosting, beat together the softened cream cheese and butter until smooth and creamy. Gradually add the powdered sugar, mixing on low speed to avoid a sugar cloud, then increase speed to medium. Add vanilla extract and milk or cream as needed to reach your desired spreading consistency.
- Once the cake is fully cooled, spread the cream cheese frosting evenly over the top. Slice and serve.
Tips
- Substitution for 7up: If you don’t have 7up, you can use any lemon-lime soda like Sprite or Sierra Mist. For a slightly different flavor, try sparkling water with a teaspoon of lemon juice added.
- Buttermilk Alternative: If you don’t have buttermilk, make a substitute by adding 1 tablespoon of white vinegar or lemon juice to ½ cup of milk. Let it sit for 5 minutes before using.
- Don’t overmix: Mix the batter just until combined. Overmixing can develop gluten and make the cake dense instead of light and fluffy.
- Room temperature ingredients: Ensure eggs, buttermilk, and soda are at room temperature to help the batter mix smoothly and rise properly.
Serving Suggestions
7up cake is incredibly versatile and pairs beautifully with a variety of toppings. Serve it chilled or at room temperature with a classic cream cheese frosting for a tangy, sweet finish. For a lighter option, dust the cake with powdered sugar or drizzle a simple lemon glaze made from powdered sugar and fresh lemon juice. This cake also pairs well with fresh berries or a dollop of whipped cream for added freshness. It makes a great dessert for potlucks, birthdays, or casual family dinners.
Variations
You can easily customize the original 7up cake to suit your taste or occasion. Add ½ cup of finely chopped nuts like pecans or walnuts to the batter for extra texture. For a chocolate twist, substitute ½ cup of the flour with cocoa powder and top with chocolate ganache instead of cream cheese frosting. Another popular variation is to fold in 1 cup of crushed pineapple (drained) to give a tropical flavor and moist crumb. For a dairy-free version, replace the butter with a plant-based margarine and use a vegan cream cheese alternative for the frosting.
Storage and Reheating
Store leftover 7up cake in an airtight container in the refrigerator for up to 4 days. The cream cheese frosting requires refrigeration to stay fresh and safe. Before serving, you can let the cake sit at room temperature for 20-30 minutes to soften slightly. If desired, warm individual slices in the microwave for 10-15 seconds but avoid overheating as the frosting may melt. For longer storage, you can freeze the unfrosted cake layers tightly wrapped in plastic wrap and aluminum foil for up to 3 months. Thaw overnight in the refrigerator, then frost as usual.
Frequently Asked Questions
Can I make 7up cake without eggs?
Yes, you can substitute eggs with commercial egg replacers, applesauce (¼ cup per egg), or mashed bananas, but the texture may be slightly different. Eggs help with structure and moisture, so expect a denser cake.
Why does 7up make the cake moist?
The carbonation in 7up acts as a leavening agent, helping the cake rise and stay light. The soda also adds moisture and a subtle citrus flavor, which brightens the overall taste.
Can I use diet or sugar-free 7up?
It’s not recommended because sugar-free sodas contain artificial sweeteners and lack the same chemical properties as regular 7up, which can affect the cake’s texture and rise.
Is it necessary to use buttermilk?
Buttermilk adds acidity, which reacts with the baking soda to help the cake rise and tenderize the crumb. You can substitute with milk plus vinegar or lemon juice if needed, but plain milk alone won’t provide the same effect.
How do I prevent the cake from sinking in the middle?
Avoid opening the oven door during baking, as temperature fluctuations can cause sinking. Also, make sure your baking soda is fresh and measure ingredients accurately. Overmixing can also cause the cake to collapse.
Can I make cupcakes with this recipe?
Absolutely! Bake the batter in lined muffin tins at 350°F (175°C) for 18-22 minutes, or until a toothpick comes out clean. Adjust baking time accordingly and watch closely to avoid overbaking.
By following this original 7up cake recipe, you’ll enjoy a nostalgic, moist dessert with a bright citrus note that’s perfect for any occasion. Whether you keep it classic or experiment with variations, this cake offers a reliably delicious treat.
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