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Dessert doesn’t get much easier than this 2-Ingredient Club Soda Cake, which turned out better than I expected. It only calls for a box of cake mix and club soda or sparkling water.

I first learned of Diet Soda Cake years ago at a Weight Watchers meeting. I’ve even used the recipe to make delicious guiltless 2-ingredient cupcakes.
But I have to be careful because the artificial sweetener in diet soda can sometimes give me a headache.
So when I heard about using club soda or sparkling water instead of diet soda and thought I’d give it a try.

Table of Contents
Recipe Notes
I like to use Betty Crocker cupcake mix when baking cakes. They make one little layer instead of two. (I know from experience when it comes to trying to stay happy, healthy and slim, little cakes are a safer, better bet than big ones, which is why I’m also such a fan of 3-2-1 Microwave mug cake.)
If you can’t find the cupcake mix you could always use just half of a regular 2-layer cake mix instead to make 1 small cake. Or use the full cake mix and 12 ounces (1-1/3 cups) of club soda or seltzer to a make 2 small cakes or one large cake in a 9×13-inch pan.
I also added a teaspoon of vanilla for good measure. Then spread the finished cooled cake with the thinnest possible layer of chocolate frosting.
This Weight Watchers club soda cake turned out sweet, moist and fluffy with a tender crumb. We didn’t miss the eggs or oil a bit. But without the binding power of eggs, this cake does tend to be a bit crumbly.
I frosted my cake with the thinnest possible layer of chocolate frosting. If you are not a fan of frosting you could sprinkle on a little confectioner’s sugar instead and save yourself 2 WW Points in the process.

How Many Calories and WW Points in this 2-Ingredient SodaCake?
Each slice of this Weight Watchers Club Soda Cake has just 159 calories.
To see your WW Points for this recipe, track it in the WW App!
(You must be logged into WW on a smartphone or tablet.)
4 PointsPlus (Old plan)
If you’re not a fan of frosting you could sprinkle on a little confectioner’s sugar instead and save yourself 2 WW Points in the process. Enjoy!
Ingredients
Ingredients for 1 Small Cake
- 1/2 box cake mix
- 2/3 cup of diet soda, soda, club soda, or sparkling water
Ingredients for 1 large or 2 Small cakes
- 1 box cake mix
- 1 can (12 ounces) diet soda, soda, club soda or sparkling water

How to Make Weight Watchers Soda Cake, Step-by-Step
Step 1: Check out the instructions on the box
Follow the directions on the box mix to preheat your oven to the proper temperature. Then, grease a cake pan with cooking spray or line muffin cups with paper liners if you want to make cupcakes.
Step 2: Make the batter
In a large mixing bowl (affiliate link), beat together the cake mix and soda for two minutes, either by hand or with an electric mixer (affiliate link).
Step 3: Bake the cake(s)
Pour the batter into the cake pan(s) or divide the batter evenly among the cupcake cups. Follow the directions on the box mix for cooking times.
Step 4: Decorate
Once the cake is cool, decorate with your favorite frosting or icing. (Or, your favorite canned frosting.) To keep calories and points low, dust with a bit of confectioners sugar. Some Weight Watchers program members like to mix cool whip and sugar free instant pudding for a light and fluffy frosting.
2-Ingredient Soda Cake Video
This CooknShare video demonstrates how to make a 2-Ingredient soda cake step by step:
What Flavors Work Best to Make Weight Watchers Soda Cake?
I liked the flavor of plain yellow cake mix and plain club soda. But the options are really endless if you want to get creative with flavor combinations of cake mix and sparkling water or diet soda. The flavor of the soda or sparkling water will be stronger when you use a vanilla or yellow cake. The soda flavor is more subtle in a stronger-flavored cake such as chocolate or spice.

Here are a few suggestions to get your creative juices flowing:
- Carrot cake mix + diet ginger ale
- Chocolate cake mix + diet cola
- Chocolate cake mix + diet root beer
- Devil’s food cake mix + diet cherry cola
- Lemon cake + lemon-lime sparkling water or soda
- Spice cake + ginger ale or ginger beer
- Strawberry cake mix + berry flavored sparkling water or soda
- Red velvet cake mix + club soda
- Vanilla cake + root beer
- Vanilla cake + orange soda
- Vanilla cake + grape soda
If you’ve made this WW Club Soda Cake, please give the recipe a star rating below and leave a comment letting me know how you liked it. And stay in touch on Pinterest, Facebook, Instagram and Twitter for the latest updates.

Weight Watchers Club Soda Cake Recipe
Ingredients
- 1 package (8.9 ounces) Betty Crocker yellow cupcake mix, (or 1/2 a regular size cake mix)
- 3/4 cup club soda or diet soda
- 1 teaspoon vanilla (optional)
- 1/4 cup favorite icing
Instructions
- Preheat oven to 350F degrees.
- Grease an 8-inch round pan with nonstick spray.
- In a bowl, whisk together the cake mix, club soda and vanilla until well blended.
- Scrape batter into the prepared baking pan.
- Place in the center of the oven and bake until a thin knife inserted into the center comes out clean, about 25 to 35 minutes.
- Remove from the oven and place on a wire rack to cool.
- When cool, remove from the pan and spread with a very thin coating of your favorite frosting.
Notes
(Must be logged into WW on a smartphone or tablet.) 8 SmartPoints (Green plan) 8 SmartPoints (Blue plan) 8 SmartPoints (Purple plan) 4 PointsPlus (Old plan) For a regular size cake mix, use 12 ounces (1-1/2 cups) of sparkling water, club soda or diet soda. Bake in 2 8-inch round cake pans or 1 9×13-inch pan. Bake according to time recommended on the box of cake mix. Cake and Soda Combinations:
- Carrot cake mix + diet ginger ale
- Chocolate cake mix + diet cola
- Chocolate cake mix + diet root beer
- Lemon cake + lemon-lime sparkling water or soda
- Spice cake + ginger ale or ginger beer
- Strawberry cake mix + berry flavored sparkling water or soda
- Red velvet cake mix + club soda
- Vanilla cake + root beer
- Vanilla cake + orange soda
- Vanilla cake + grape soda
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.






I’m sure you could use any egg substitute (such as Egg Beaters) or any liquid egg whites and still get that same bonding action. Eggs and egg whites are both zero point foods. What are your thoughts on this?
Hi Kevin, I agree. I’m curious to experiment more with this and similar easy cake recipes. My next text will be with a cake mix, 3/4 cup club soda and 2 eggs, since I don’t tend to have egg beaters on hand, but always have eggs. Hope this helps. ~Martha
Hi Martha. I was dying for a piece of cake this morning but didn’t want to make one from scratch. I remembered one of your posts saying that we can mix cake mix and seltzer. I had a lemon cake mix in the house so I just added 12 ounces of seltzer and a teaspoon of lemon extract. I baked it in a 9 x 13 pan and it’s delicious. Thanks so much for sharing this along with all your other recipes.
Hi Ann, So glad you liked it! ~Martha
Hi Martha,
Would this work using angel food cake mix?
Thanks
Hi Tricia, I haven’t tried it with angel food cake mix. I don’t think it would be necessary. I believe
that the Betty Crocker Angel Food Cake Mix only requires that you add water. Hope this helps. ~Martha
I was wondering if you can use regular cake mix and still make two cakes just using 2/3 cup diet soda?Or should I double amount of soda?
Hi Brenda,
If you want to use a whole cake mix to make 2 cakes you will want to double the amount of soda because you are doubling the amount of cake mix. You could also bake all the batter at once in a 9×13-inch pan. Just bake according the the time suggested on the box of cake mix.
Hope this helps.
Thanks for posting this. I have used the cake w/diet soda in the past. I like the idea of a smaller cake and not using something with artificial sweetener since recently some family members have been getting migraines from them.
You’re welcome, Barb! I really think the club soda is a great alternative.
I don’t like ‘fake’ sweeteners either and made a boxed chocolate cake with club soda last year. To make it even better, I added chopped walnuts and instant espresso coffee granules. It was a hit.
๐
Hi Barbara,
Love the idea of doctoring up the club soda cake with chopped walnuts and instant espresso. Yum ๐