Keto Oatmeal Cream Pies
Published August 24, 2023 • Updated March 12, 2026
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I spent weeks perfecting these keto oatmeal cream pies to taste like the Little Debbie original. Soft, chewy oat fiber cookies with vanilla marshmallow cream filling at only 1.4g net carbs per sandwich cookie.
I grew up eating Little Debbie oatmeal creme pies out of the box. They were in my lunchbox almost every day, and I remember peeling the cookies apart to eat the cream filling first. When I started eating keto, those were one of the first things I missed. So I spent weeks in my kitchen figuring out how to make a low-carb version that actually tastes like the original.
I have tested a lot of low-carb cookies over the years, from my keto pumpkin whoopie pies and keto peanut butter cookies to my keto no bake cookies, and I keep coming back to this recipe as one of my favorites. The combination of warm spices, oat fiber, and that fluffy cream filling is something I crave on a regular basis. If you love nostalgic keto snack cakes, check out my keto Christmas tree cookies and my keto Hostess cupcakes too.

I wanted these to be a true Little Debbie copycat, not just a random keto cookie with cream in the middle. Here is what makes my version work:
- Oat fiber instead of oats gives you the oat flavor and texture with zero net carbs. I use it in both the cookies and the filling for extra body.
- Molasses extract adds that deep, warm sweetness that real oatmeal cookies have. I use the extract instead of actual molasses to keep the carbs down.
- Marshmallow-flavored cream filling sandwiched between the cookies. I add a few drops of toasted marshmallow flavoring, which gives that subtle Little Debbie undertone.
- Warm spices (cinnamon and a touch of salt) round out the flavor so these taste like the real deal, not some bland keto substitute.
- Each keto sandwich cookie comes in at only 1.4g net carbs.
I make a batch of these every couple of weeks and my family finishes them within two days. They are one of the best low-carb desserts I have developed, and I think once you try them you will understand why I keep making them. If you want more cookie ideas, browse my keto ice cream sandwiches or my almond flour cookies next.
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Keto Oatmeal Cookies Ingredients
1 cup unsalted butter, softened
3/4 cup packed brown sugar-free sweetener
1/3 cup granulated sugar-free sweetener
1 teaspoon molasses flavor extract
1 teaspoon vanilla extract
2 eggs, room temperature
3 cups almond flour
1/3 cup oat fiber
1 teaspoon baking soda
1/2 teaspoon salt
1/4 teaspoon ground cinnamon
Vanilla Cream Filling Ingredients
1 cup unsalted butter, softened
1 1/2 cups powdered sugar-free sweetener
1 tablespoon oat fiber
1 tablespoon nut milk or cream
1 teaspoon vanilla extract
1 1/2 dropperfuls marshmallow flavoring, optional
Step by Step Instructions
Step by Step Instructions
Preheat oven
Preheat oven to 325˚F. Line a baking sheet with parchment paper and set aside.
Combine wet ingredients
In a large bowl, cream together softened butter, brown sugar-free sweetener and granulated sweetener. Mix until creamy. Stir in molasses flavoring, vanilla extract and eggs. Set aside.
- 1 cup unsalted butter, softened to room temperature
- 3/4 cup packed browned sugar free sweetener
- 1/3 cup granulated sweetener
- 1 teaspoon molasses extract
- 1 teaspoon vanilla
- 2 eggs
Mix dry ingredients
In a medium bowl, whisk together almond flour, oat fiber, baking soda, salt and cinnamon.
- 3 cups almond flour
- 1/3 cup oat fiber
- 1 teaspoon baking soda
- 1/2 teaspoon salt
- 1/4 teaspoon ground cinnamon
Finish the oatmeal cookie dough
While mixing continuously with an electric mixer, slowly add in the dry ingredients into the bowl with the wet ingredients. Continue to mix until both are combined.
Scoop the dough
Using a 1.25 inch cookie scoop, place balls of cookie dough onto the prepared baking sheet, spacing about 1 1/2 inches apart.
Bake
Bake in the oven at 325˚F for 9-10 minutes or until the edges start to turn golden. Remove from the oven and let the cookies sit on the cookie sheet for several minutes until you can easily slide a spatula underneath. Then transfer to a wire rack to continue cooling.
Cream filling
In a large bowl, cream butter with an electric mixer until fluffy. Slowly mix in sugar-free sweetener until combined. Add oat fiber, nut milk or cream, vanilla extract and marshmallow flavoring if using. Continue mixing until light and fluffy.
- 1 cup unsalted butter, softened to room temperature
- 1 1/2 cup sugar free sweetener (use recommended brand above)
- 1 tablespoon oat fiber
- 1 tablespoon nut milk or cream
- 1 teaspoon vanilla
- 1 1/2 droppersful marshmallow flavoring, optional
Make sandwich cookies
Scrape frosting into a piping bag and pipe swirls of filling on the underside of one cookie. Place a second cookie on top.
Nutrition disclaimer
The nutrition information provided is an estimate and is for informational purposes only. I am a Doctor of Pharmacy (Pharm.D.); however, this content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified health provider before making any lifestyle changes or beginning a new nutrition program.
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Get My Macros + Recipes →Frequently Asked Questions
Can I use real molasses instead of molasses extract?
I have tested both. One tablespoon of blackstrap molasses adds about 10g of net carbs to the entire batch, which comes out to roughly 1g extra per cookie. If that fits your macros, go for it. I personally stick with molasses extract because it gives me that deep, warm flavor without any extra carbs. A little goes a long way with the extract.
How do I tell when the cookies are done baking?
I pull mine out when the edges just start turning golden brown but the center still looks slightly underdone. They firm up a lot as they cool on the baking sheet. If you wait until they look fully done in the oven, they will be too crispy once they cool. I usually check at the 9-minute mark and go from there. Every oven is different, so I always set my timer for a minute less than what I think they need.
My cookies fell apart when I tried to assemble them. What went wrong?
I have had this happen, and it almost always comes down to not letting the cookies cool completely. They are fragile when they are warm. I let mine sit on the baking sheet for a full 10 minutes, then transfer them to a wire rack for another 10-15 minutes before I touch them again. If they are still crumbling after cooling, your dough was probably too dry. I add a teaspoon of water or an extra egg yolk next time that happens.
Can I make these dairy-free?
I have made these dairy-free by swapping the butter for coconut oil in the cookie dough and using a coconut cream-based filling. The cookies turn out just as soft. For the cream filling, I whip chilled coconut cream with powdered sweetener and a bit of vanilla. It is not identical to the butter-based version, but I actually prefer the lighter texture. One of my readers also had great results using palm shortening in the filling.
How long do these last, and can I freeze them assembled?
I have left them on the counter and they hold up for about 2 days before the filling starts to soften too much. In the fridge, I get a solid 5-7 days out of them. My preference is storing them in the fridge because the cold firms up the cream filling and gives them a better bite. I pull them out about 10 minutes before eating so the cookie softens a little. For freezing, I lay the assembled cookies flat on a parchment-lined baking sheet, freeze until solid (about an hour), then stack them in a freezer bag with parchment between layers so they do not stick. They keep for up to 2 months frozen. I tried freezing the cookies and filling separately once, but the cookies cracked when I tried to spread filling on the frozen ones. Assembled first is the way I do it every time.
Can I use coconut flour instead of almond flour?
I would not do a straight swap because coconut flour absorbs way more moisture than almond flour. I have tried it, and you need roughly 1/4 cup coconut flour in place of 1 cup almond flour, plus an extra egg to compensate. The texture changes too, becoming more cake-like and less chewy. If you need to be nut-free, I recommend using 1/4 cup coconut flour plus 2 tablespoons of oat fiber in place of the almond flour, and add one extra egg to the dough.
What brand of oat fiber do you use and where do you buy it?
I buy my oat fiber online because most grocery stores do not carry it. I have tried several brands over the years and the biggest difference is how finely ground they are. Finely ground oat fiber works best for cookies because it blends smoothly into the dough without any grittiness. Coarse oat fiber gives you a sandy texture that I do not want in these. I buy in bulk since I go through it fast. Check product reviews before ordering because some brands have an almost cardboard taste. The one I settled on is mild and slightly earthy, which is exactly what I want for that classic oatmeal cookie flavor.
Why do my cookies spread too much while baking?
I ran into this early on and figured out two main causes. First, my butter was too soft when I mixed the dough. I use cold butter now and that solved most of the spreading. Second, I was not chilling my dough before scooping. I refrigerate my dough for at least 20 minutes before I scoop and bake. If your cookies are still spreading after that, try adding an extra tablespoon of almond flour to thicken things up. That trick has saved me more than once.


I didn't have the molasses flavor extract so I used a tiny drop of actual blackstrap molasses instead (maybe 1/4 teaspoon) and the cookies came out with this deeper, almost caramel-y flavor I really liked. First time working with oat fiber and I was a little worried it would taste off, but the texture was exactly what I wanted. Making a double batch this weekend.
1/4 tsp barely moves the macros. Real molasses has a depth the extract can't quite match. That's the note I was going for when I developed this. Glad the oat fiber clicked.
Making these for a Mother's Day brunch since my mom is keto, and it's genuinely hard to find anything that doesn't taste like a consolation prize. Should I assemble them the night before, or keep the cookies and filling separate until right before serving? The marshmallow cream filling is what I'm most worried about. Does it firm up too much in the fridge, or does it hold up okay once sandwiched? I've made keto sandwich cookies ahead before and ended up with a soggy mess.
Assemble the night before. The marshmallow filling firms up in the fridge, which makes them easier to serve (no sliding). I've kept assembled ones in there for 3 days with no sogginess. Pull them out 10-15 minutes before the brunch so the filling softens back up a bit.
I've tried probably five other keto oatmeal cream pie recipes over two years. None got the cookie texture right. This one does. The oat fiber gives you that actual soft chew and the molasses extract tastes like the real deal. Four stars only because I'd load more cream filling next time, but the cookies are the best keto version I've found.
Five recipes is real research. I always pile extra filling on mine anyway, so that four-star tracks. The cookies can take it.
The dough kept sticking to my scoop until I threw it in the fridge for 20 minutes. Total fix. Cookies came out uniform, didn't spread into each other, and the middles stayed soft instead of flattening out. Also tried Lakanto golden in place of the regular brown sugar-free sweetener and the molasses depth was noticeably better with it. Worth the swap if you have it.
Left a batch on the counter and my son (not keto, very much a Little Debbie purist) texted me from the other room asking what brand I had bought. The oat fiber texture is close enough that it fooled him completely, and now I can't keep these in the house for more than a day.
Ha. A Little Debbie purist texting from the other room asking what brand you bought. That's the only review that counts.
I've made three other keto oatmeal cream pie recipes and they all tasted like almond flour cookies with frosting slapped in the middle. The oat fiber here actually does something to the chew, and the marshmallow cream filling is the real deal. This is the only version I'm keeping.
Three versions is real research. The filling was the hardest part, most keto versions just use whipped cream cheese and call it a day.
I kept scrolling past this one because oat fiber cookies sounded like a compromised version of the real thing. I've been burned too many times by keto desserts that promise chewy and deliver chalky. Made them last weekend out of desperation for something sweet and now I'm genuinely annoyed I waited so long. The texture on these is soft in a way other keto cookies just aren't. Most almond flour cookies are fine when warm but turn to dust by day two. These are still soft on day three, which is the thing that actually surprised me. The molasses extract is what other recipes skip, and it's what makes these taste like an actual oat cookie instead of a sweet almond disc. Double batch next time, no question.
Ha, fair. Day two crumble was what I kept fighting in testing. Oat fiber ratio fixed it.
I expected the oat fiber to give these a weird aftertaste, but they're closer to Little Debbie than I thought anything keto could get.
That's the whole goal. The molasses flavor extract is what finally got it there, took a few batches to nail the ratio.
These hit really close to the original, which surprised me. My one note: the filling gets pretty stiff in the fridge, so pull them out about 15 minutes before you want to eat them. Texture is way better at room temp.
Yes, the filling firms up a lot in the fridge. 15 minutes is about right, I usually just leave them on the counter while I'm getting dinner ready and they're perfect by the time we eat.
Little Debbie oatmeal cream pies were the one food I genuinely mourned when I went keto. Not bread, not even pasta. Just those. The oat fiber in this dough does something I wasn't prepared for. There's this almost-earthy chew that I thought I'd left behind for good, and it's actually there. Made these on Saturday and I've been thinking about them since.
Little Debbie oatmeal cream pies were such a specific loss. The oat fiber was the thing I kept adjusting to get that chew right. Ended up at 1/3 cup after a lot of failed batches.
My store never has oat fiber and I hate waiting when I want to bake. Would coconut flour work as a sub, or does it totally change the texture?
Coconut flour will work but don't do a straight swap. I'd use about 2 tablespoons in place of the 1/3 cup (coconut flour absorbs way more liquid). The oat flavor will be slightly softer but the cookie still comes together.
Thanks for this awesome recipe Annie. I follow you on YouTube and have had success with a lot of your recipes. The only thing I substituted in this recipe was the butter in the filling, for palm shortening. The cookies are superb, and the filling came out delicious too.
Anticipating your next creation. :)
Nicci
Haven't tested palm shortening in the filling but that makes sense. It's more heat-stable than butter so the filling probably holds up longer out of the fridge.
WAY too sweet for my liking, but in small doses, these are a good alternative to the Little Debbie snacks.
Fair. The filling runs very sweet. Cutting the sweetener back by a third or so makes a real difference if you try them again.
These are absolutely delicious! Thanks for sharing!
Try them cold if you haven't. The filling sets up in the fridge and the whole thing holds together way better.
Be aware that coconut flour is more moist.
Yep, it soaks up liquid fast. That's why I'd only use about 1/4 the amount if swapping it in.