I had fresh summer squash sitting in my kitchen, and I was planning to make one of those simple, comforting casseroles that practically defines summer.
You know the kind.
Fresh squash.
A creamy mixture.
Seasonings.
Maybe some cheese.
Then everything goes into a baking dish until the squash is tender and the top is golden.
But when I started putting the casserole together, I realized I was out of milk.
Normally, that would mean either changing the recipe or making a quick trip to the grocery store.
Instead, I looked in the refrigerator and saw a cold can of cream soda.
And that’s when I had one of those ideas that sounds much better in your head than it does when you say it out loud:
What if I used cream soda instead of milk?
It was sweet.
It was carbonated.
It tasted like vanilla.
And it was definitely not milk.
Still, I was curious.
So I poured the cream soda over my fresh summer squash casserole, put the dish in the oven, and waited.
I wasn’t expecting a miracle.
Honestly, I was preparing myself for a soggy, overly sweet casserole that would have to go straight into the trash.
But 45 minutes later, when I pulled the baking dish from the oven, the result was much more interesting than I expected.
The cream soda had completely changed the casserole.
Here’s what happened.
First, the Casserole Looked Completely Different
When the casserole first went into the oven, there was a noticeable layer of liquid around the squash.
The cream soda looked almost strange sitting in the baking dish.
It was pale, bubbly, and sweet-smelling.
The squash itself looked completely normal.
But after 45 minutes of baking, the appearance had changed.
The cream soda was no longer bubbly.
The liquid had been absorbed, evaporated, or incorporated into the other ingredients.
The top had developed some browning.
And the kitchen smelled surprisingly sweet.
It didn’t smell exactly like a traditional squash casserole anymore.
There was a subtle vanilla-like aroma mixed with the savory smell of the vegetables and seasoning.
That was my first indication that this experiment had actually done something.
Why the Bubbles Didn’t Survive the Oven
The carbonation sounds like one of the strangest parts of this experiment.
After all, cream soda is carbonated.
Would the casserole somehow become fizzy?
No.
Not really.
Carbon dioxide dissolves in a liquid under pressure, but heating encourages that dissolved gas to escape.
As the cream soda warms in the oven, the carbonation rapidly disappears.
That’s why you don’t end up with a bubbly casserole after baking.
The “soda” part of the experiment becomes much less important once the liquid has been heated.
What remains are the water, sugar, flavor compounds, and other ingredients in the beverage.
So if you’re trying this experiment because you think the squash will become carbonated, that’s probably not going to happen.
The bubbles are essentially the first thing to go.
The Sugar Was the Biggest Change
The biggest difference between cream soda and milk is not the carbonation.
It’s the sugar.
Milk contains naturally occurring lactose, but cream soda is formulated as a sweet beverage.
That means pouring a can of cream soda into a savory casserole introduces a substantial amount of sweetness.
And that sweetness changes the cooking process.
As the casserole heats, some of the sugars become concentrated as water evaporates.
The result can be a sweeter, stickier surface and potentially more browning.
That’s why the casserole may look darker around the edges or on exposed portions of the vegetables.
It isn’t necessarily burning.
The sugars are simply changing under heat.
However, too much sugar plus high heat can eventually produce unpleasantly dark or burnt flavors.
So the cream soda experiment requires more attention than a normal milk-based casserole.
The Squash Became Very Tender
Fresh summer squash already contains a tremendous amount of water.
That matters.
When you bake squash, heat breaks down its structure and causes the vegetable to release moisture.
Now add a sweet liquid to the baking dish.
The squash has even more moisture surrounding it during the early part of cooking.
After 45 minutes, the squash was noticeably softer.
This can be a good thing if you enjoy tender squash.
But it can also become a problem.
If your casserole contains a lot of liquid and the squash is sliced very thinly, the finished dish can become watery or mushy.
That means the amount of cream soda matters.
A small amount can add flavor and moisture.
A full can can dramatically increase the amount of liquid and sugar in the casserole.
It Didn’t Taste Like a Creamy Casserole Anymore
This was probably the most obvious difference.
Milk contributes creaminess and a relatively neutral dairy flavor.
Cream soda contributes sweetness and vanilla-like flavor.
Those aren’t interchangeable characteristics.
The finished casserole therefore didn’t have the same rich, creamy profile that milk would have provided.
Instead, the squash had a subtle sweet flavor.
The effect wasn’t necessarily as intense as drinking cream soda because the beverage was diluted by all the other ingredients.
But it was noticeable.
The casserole had moved away from traditional savory squash territory and toward something more unusual.
If you love sweet-and-savory combinations, you might find the result interesting.
If you’re expecting a classic squash casserole, you may be disappointed.
Why the Vanilla Flavor Was Surprisingly Noticeable
Most cream sodas have a distinctive vanilla-like flavor.
When you drink one cold, the sweetness and carbonation dominate your palate.
When you bake it, the carbonation disappears.
That leaves the flavoring behind.
Because squash has a relatively mild flavor, the vanilla notes can become surprisingly noticeable.
The result isn’t necessarily “vanilla squash.”
Instead, it’s more like a faint sweet aromatic note in the background.
The other ingredients still matter.
If you use strong cheese, garlic, onions, black pepper, or herbs, those flavors can compete with the sweetness.
If the casserole is lightly seasoned, the cream soda becomes much more obvious.
The Cheese Became Even More Important
If you’re making a squash casserole with cheese, the cheese can help balance the sweetness.
Sharp cheeses are particularly useful because their salty, savory character contrasts with the sugar from the soda.
A mild cheese may allow the sweetness to stand out more.
A sharper cheese can make the finished dish feel more balanced.
This is the same basic principle behind many sweet-and-savory foods.
Salt and acidity can keep sweetness from becoming overwhelming.
So if you’re experimenting with cream soda, don’t think only about the soda.
Think about the entire flavor system.
The Texture Was the Real Wild Card
The biggest technical challenge with using cream soda instead of milk is that the two liquids don’t behave the same way.
Milk contains proteins, fat, minerals, and other components.
Cream soda is primarily a sweetened beverage.
It doesn’t provide the same creaminess.
If your original recipe relies on milk to create a creamy sauce, simply replacing it with soda won’t reproduce the same texture.
You might end up with:
- A thinner casserole
- More liquid around the vegetables
- A sweeter sauce
- More browning
- Less creaminess
That’s why this should be considered a completely different recipe rather than a true one-to-one substitution.
Why the Casserole Could Become Watery
Summer squash is naturally watery.
That means you’re starting with a vegetable that can release a significant amount of moisture during baking.
Adding an entire can of cream soda gives the casserole even more liquid.
Some of that liquid will evaporate.
Some will be absorbed.
Some may remain in the bottom of the baking dish.
If you want a firmer casserole, one useful technique is to salt sliced squash beforehand and allow some moisture to drain before assembling the dish.
Patting the squash dry can also help.
The goal isn’t to remove every drop of water.
It’s to prevent the casserole from becoming overloaded with moisture.
The 45-Minute Mark Was Important
After 45 minutes, I checked the casserole carefully.
The squash was tender.
The top had browned.
The liquid had reduced substantially.
And the casserole had developed a completely different aroma from when it went into the oven.
But the important thing to remember is that 45 minutes isn’t a universal cooking time.
Your casserole could require less or more time depending on:
- Oven temperature
- Slice thickness
- Amount of squash
- Size of baking dish
- Amount of cream soda
- Other ingredients
- Whether the dish is covered
Use the appearance and texture of the casserole as guides rather than treating 45 minutes as a fixed rule.
Would I Use Cream Soda Again?
Here’s where I landed.
Would I use cream soda instead of milk in a traditional squash casserole?
Probably not if I wanted a classic casserole.
Milk provides something cream soda simply can’t replicate.
But would I make a deliberate sweet-and-savory squash dish using cream soda?
That’s more interesting.
The experiment demonstrated that cream soda can function as a flavorful cooking liquid.
It brings sweetness and vanilla-like notes.
It also contributes moisture during the early stages of baking.
But it’s not a neutral replacement for dairy.
If you use it, you’re creating a different dish.
And sometimes that’s exactly what makes a kitchen experiment fun.
What I Would Change Next Time
If I repeated this experiment, I wouldn’t necessarily pour the entire can into the dish.
I’d probably use a smaller amount.
That would let me introduce some sweetness without overwhelming the squash.
I’d also use a stronger cheese and more savory seasoning.
Garlic, black pepper, onion, and fresh herbs could help balance the sweetness.
I’d make sure the squash wasn’t excessively wet before assembling the casserole.
And I’d watch the top closely during baking.
Because of the sugar, excessive heat could cause the surface to brown much faster than expected.
Could You Use Diet Cream Soda?
That would be a completely different experiment.
Diet cream soda generally uses non-sugar sweeteners rather than ordinary sugar.
That means the browning, sweetness, and cooking behavior can differ.
If the goal is to recreate the result described here, regular cream soda is the relevant ingredient.
But if you’re experimenting with a sugar-free version, don’t assume you’ll get identical results.
Different sweeteners behave differently when heated.
Could You Use Other Sodas?
Technically, you could experiment with other sweet carbonated beverages, but each would produce a different result.
Cola would bring caramel-like flavors.
Ginger ale would bring a ginger-forward sweetness.
Lemon-lime soda would provide a brighter citrus profile.
Root beer would create a much stronger herbal and vanilla character.
Cream soda is particularly interesting because its vanilla profile can complement sweet vegetables without adding a strongly recognizable fruit flavor.
Still, none of these should be considered a standard substitute for milk in a conventional casserole.
They’re experimental ingredients.
Food Safety Still Matters
One thing that shouldn’t get lost in the fun of the experiment is food safety.
Fresh squash should be handled properly and washed before preparation.
The FDA recommends washing fresh produce under running water before eating or preparing it.
If your casserole contains eggs, dairy, meat, or other perishable ingredients, handle those ingredients according to appropriate food-safety practices.
And once the casserole is cooked, don’t leave it sitting at room temperature indefinitely.
Refrigerate leftovers promptly.
The fact that the casserole contains soda doesn’t make it shelf-stable.
How to Make the Experiment More Balanced
If you’re curious enough to try this yourself, think about balance.
You have three major components:
Sweetness: from the cream soda.
Savory flavor: from the squash, cheese, herbs, spices, and other ingredients.
Richness: from whatever fat or dairy ingredients remain in the recipe.
The best result will come from making sure none of these completely dominates.
For example, a sharp cheese can provide contrast to the sweetness.
Black pepper can add warmth.
Garlic can add savory depth.
Fresh herbs can make the dish taste brighter.
A small amount of cream soda can provide the unusual flavor without turning the casserole into dessert.
Frequently Asked Questions
Can cream soda really replace milk in a squash casserole?
Not as a direct one-to-one substitution. Cream soda and milk have very different compositions and functions. Cream soda adds sweetness, flavor, and liquid but doesn’t provide the same creaminess or proteins as milk.
Will the cream soda stay carbonated during baking?
No. Heating causes the dissolved carbon dioxide to escape, so the finished casserole won’t remain fizzy.
Will the squash taste sweet?
It can. The amount of sweetness depends on how much cream soda you use and how much other seasoning is present.
Why did my casserole brown more than usual?
The sugar in cream soda can encourage browning as the casserole cooks, particularly on exposed surfaces.
Can I use diet cream soda?
You can experiment with it, but don’t expect identical results. Sugar substitutes don’t necessarily behave like regular sugar during cooking.
Can I use cream soda with cheese?
Yes, although the combination is unusual. A sharp or salty cheese may help balance the sweetness better than a very mild cheese.
Why did my casserole become watery?
Summer squash naturally releases moisture during cooking. Adding a large amount of cream soda can increase the total liquid in the dish. Draining or patting the squash dry before baking can help.
Is this a traditional squash casserole technique?
No. This is a creative substitution experiment rather than a conventional preparation method.
The Final Verdict
Forty-five minutes after I poured cream soda over my summer squash casserole, I had learned something I wasn’t expecting.
Cream soda does not behave like milk.
It doesn’t create the same creamy texture.
It doesn’t have the same neutral flavor.
And it certainly doesn’t produce the same kind of casserole.
But it does bring something completely different to the table.
The carbonation disappears.
The sweetness becomes concentrated.
The vanilla-like flavor becomes more noticeable.
The squash becomes tender.
And the surface can brown more readily because of the sugar.
The result is a casserole that is sweeter, more aromatic, and much more unusual than the one I originally intended to make.
Would I recommend grabbing cream soda every time you run out of milk?
No.
But would I call the experiment a complete disaster?
Definitely not.
Sometimes the kitchen is where strange ideas become surprisingly good discoveries.
The important thing is understanding what you’re actually changing.
When you replace milk with cream soda, you’re not simply replacing one liquid with another.
You’re changing the sweetness, flavor, texture, and cooking behavior of the entire dish.
And that’s exactly what happened in my baking dish.
What started as a simple “I’m out of milk” problem turned into a 45-minute food experiment—and a reminder that some of the most memorable dishes can begin with ingredients that were never supposed to go together in the first place.