Gluten-Free Baked Oatmeal (Dairy-Free with Vegan Option)

Looking for an easy, healthy breakfast that you can make ahead? This gluten-free baked oatmeal is soft, lightly sweet, and incredibly satisfying. It’s naturally dairy-free and can easily be made vegan or with eggs depending on what you prefer.

Unlike traditional oatmeal, this version bakes up into a tender, sliceable dish—almost like an oatmeal cake—making it perfect for busy mornings, meal prep, or even a wholesome snack.

Whether you’re feeding a family or just want something nourishing ready to go, this baked oatmeal is a simple recipe you’ll come back to again and again.

Breakfast is a tough meal of the day for families on the go who are trying to be healthy.  It's easy to lean on convenience foods so that everyone can grab something fast when they're headed out the door, and that can mean some not so good decisions, you know?

My Childhood Unhealthy Breakfasts

When I was little, we had a lot of those “not so good for you” type breakfasts.

Some of the breakfast “foods” that I remember us having were:

• Thomas' English Muffins
• Thomas' Corn Toast-R-Cakes
• Homemade Cinnamon Toast (made with margarine and white bread and granulated white sugar—yikes!)
• Ka-Boom Cereal (my sister's favorite)
• Cinnamon Toast Crunch
• Life Cereal
• Cream of Wheat

Yikes.

Now that I've woken up to how important it is to have real food, things have changed.

A Healthier Breakfast Option

Breakfast can be one of the hardest meals to get right—especially when life is busy. It’s easy to fall back on convenience foods that don’t keep you full or energized for long.

That’s one of the reasons I love this baked oatmeal. It’s made with simple, whole-food ingredients and keeps well, so you can make it ahead and have a nourishing option ready whenever you need it.

We’ve even been known to enjoy less “traditional” breakfasts around here (like chia pudding or even leftovers or healthy fudge), but this recipe is a great middle ground—it feels familiar, comforting, and just a little special.

Why This Baked Oatmeal Is So Good

This recipe has a slightly unique twist that makes it stand out.

Instead of baking the oats right away, you can soak them first. This does two things:

• Improves digestibility
• Creates a softer, more cake-like texture

If you soak the oats longer (even up to 24 hours), the result is surprisingly light and fluffy—almost like a true oatmeal cake.

If you skip soaking, the texture will be more like classic baked oatmeal: a little denser and more hearty.

Both versions are delicious—it just depends on what you’re in the mood for.

The Origin of this Cake

Our Baked Oatmeal Cake obsession all started when our dear friend, Beckie, shared some baked oatmeal with us at her home one night after a homeschooling family gathering.  I'd heard of baked oatmeal, but had never made it nor tried it.

Well, my kids gobbled it up, and when gobbling like that happens, I go on a mission. This time on a quest for the best Baked Oatmeal recipe that I could find.

I came home with Beckie's recipe in hand and poked around on the internet a bit. I found a few recipes that intrigued me and made a combination of Becky's and another one that looked great.

The resulting success story is what you see pictured above.

A Kitchen Mistake Gone Right

The funny thing about this recipe is it basically became a “cake” by mistake.

I knew it was important to soak grains (especially oats) so when I set out to try out my version of the cake, I set the oats out to soak overnight.

The next day ended up being a flurry of too many things to do and so I didn't get around to baking the cake until about 24 hours later.  The result? A delicious not-too-sweet-at-all cake that is so light, you won't believe that it is made from whole rolled oats.

In fact, when I took the 24-hour-soaked version over to Beckie's house for her to try, she said, “You added flour to this, didn't you?”

Nope—the oats just turned out that way. See how much soaking your grains can change the grains themselves?

Side note–for another “mistake turned family favorite, see my post on Chaat Masala.)

So you can make this recipe just like a regular baked oatmeal by not soaking, or soak for 24 hours for the oatmeal cake-ish version, or soak overnight only for a dense baked oatmeal bottom and a cake-like top.

Either way it's baked oatmeal yumminess.

The photos in this post are of the “soaked for 24 hour” option.

Don't know about soaking grains?  I never had heard of this until a few years ago and I didn't really understand.  The basic reason is that grains (and especially oats) contain phytic acid and other anti-nutrients that make digestion difficult.  You can read more about this in my post on how and why to soak grains.

We like this recipe both ways, but I personally think the cake version is a bit nicer.

If you try it both ways, I would love to hear what you think!

Either way, this cake tastes special—especially topped with whipped cream, coconut whipped cream, or yogurt–and lots of fruit.

Won't the Cake Spoil If It's Left Out Overnight?

I get this question often.

The answer is no, it won't, if you are using an acidic medium (like cultured milk, whey, or apple cider vinegar or lemon juice).

If you are using regular dairy, then you MUST use an acidic medium to prevent spoilage. If you are not using dairy, you should be able to soak the mixture on the counter overnight with no problem.

Recipe Notes

• Topping Options: I make this regularly with walnuts and dehydrated dried apples, but bananas and walnuts, fresh apples and pecans are other great options. Anything goes. For the cake in these photos we used berries and walnuts. We even once just blended shredded coconut (about 1/3 cup) into the batter and sprinkled both cinnamon sugar and extra coconut on top. Mmmmm…..
• Milk Options: Use any type of milk you prefer.  I recommend healthy raw milk if you use dairy.  Otherwise, any non-dairy alternative will work great like Almond Milk, Coconut Milk, or Rice Milk, etcetera.
• Bake In Bulk: As with any tried and true recipe, I recommend baking in bulk to save time and money. I typically mix up and soak 4 batches of this cake at time. Make a bunch and freeze for on-the-go breakfasts or snacks anytime you need them.
• Gluten-free Oats: If necessary, use gluten-free oats. Here is a great brand. I've heard that the GF Harvest Company's oats are very reliably gluten-free and they test for glyphosate too.
• Oil / Fat Options: You can use any other healthy fat for the coconut oil, or use applesauce for a fat-free option.
• Sweetener Options: Although xylitol is a good candida-friendly sweetener, organic erythritol is as well. Or sub a liquid sweetener using my guidelines in Substituting Sweeteners. You can use an additional 1/3 cup of a healthy granulated sweetener instead of stevia. If using stevia, here is a great brand of stevia scoops.
• Egg Alternatives: This is the egg substitute we used for years. See my Powdered Egg Substitute for a homemade option. This cake turns out great with either option.
• Baking Powder Option: If you would like to make your own baking powder, or need a corn-free or grain-free option, see this Grain-free Baking Powder.
• Cinnamon Sugar Substitute: See this Healthier Cinnamon Sugar for a homemade cinnamon sugar alternative.
• Soaking Notes – typically an acid medium is recommended for soaking grains, but there are mixed thoughts on this. You may add the apple cider vinegar or lemon juice to the oats before soaking if you like, but you will end up with a slightly acidic taste.

Other Healthy Baked Goods to Try:

If you're a fan of whole-grain baking, here are some other recipes to try:

• Whole-Grain Doughnuts
• Pumpkin Snickerdoodles
• Super Quick Whole Grain Biscuits
• Soft Pumpkin Cookies
• Frosted Chocolate Mint Cookies
• 3 Ingredient Buckwheat Crepes

I'd love to hear how you like this Baked Oatmeal Cake once you've tried it!