Keto Oatmeal Cream Pies

Annie Lampella @ Ketofocus

By Annie Lampella, Pharm.D.

Published August 24, 2023 • Updated March 12, 2026

Reader Rating
4.6 Stars (7 Reviews)

This post may contain affiliate links. See my disclosure policy.

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.

Two homemade oatmeal cream pies stacked on each other with a bite taken out of the top sandwich cookie. A box of Little Debbie's Oatmeal Creme Pies is in the background.

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 Cream Pies

4.6 (7) Prep 20m Cook 20m Total 40m 18 servings

Keto Oatmeal Cookies Ingredients

Vanilla Cream Filling Ingredients

Step by Step Instructions

Step by Step Instructions

1
Preheat oven

Preheat oven to 325˚F. Line a baking sheet with parchment paper and set aside.

A baking sheet lined with white parchment paper.
2
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.

A clear glass bowl with wet cookie ingredients inside.
Tip Use a brown sugar substitute that can pack and has moisture to it.
Ingredients for this step
  • 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
3
Mix dry ingredients

In a medium bowl, whisk together almond flour, oat fiber, baking soda, salt and cinnamon.

A glass bowl with almond flour inside.
Tip Use super fine blanched almond flour.
Ingredients for this step
  • 3 cups almond flour
  • 1/3 cup oat fiber
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1/4 teaspoon ground cinnamon
4
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.

A clear glass bowl with oatmeal cookie dough inside.
5
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.

A baking tray with six cookie dough balls scooped on the tray.
Tip If you don't have a cookie scoop, pinch off dough and roll into a 1 inch ball. Or add to a piping bag and pipe out cookie dough. No need to flatten cookies, although it won't hurt if you do.
6
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.

Cookies baked on a tray with crinkle tops.
Tip The tops of the cookies may look underdone and will be soft to the touch.
7
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.

A glass bowl with vanilla cream frosting inside.
Tip Double the cream frosting if you love extra filling in your cookies.
Ingredients for this step
  • 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
8
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.

Piping cream filling on a bottom sandwich cookie.
Tip Makes about 18 sandwich cookies if you used a 1.25 inch cookie scoop.
Nutrition Per Serving 1 sandwich cookie
265 Calories
25.5g Fat
4.7g Protein
1.4g Net Carbs
20.6g Total Carbs
18 Servings
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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Keto Oatmeal Cream Pies

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.

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Rows of oatmeal cream pies on a black wire cooling rack.

Are oats keto friendly?

I get this question constantly, and the short answer is no. A half cup of rolled oats has around 27g of net carbs, which would wipe out most of your daily carb budget on keto. I used to try small portions of oats in recipes, thinking a tablespoon here or there would be fine, but the carbs add up fast. That is why I switched to oat fiber for all my keto baking that needs an oat-like flavor or texture.

Oat fiber: the low-carb replacement for oats

Oat fiber is the ingredient that makes these keto oatmeal cream pies possible. It comes from the outer hull of the oat grain, and it is almost entirely insoluble fiber with nearly zero net carbs. I use it in these cookies because it gives you that slightly grainy, hearty texture that real oatmeal cookies have. The flavor is mild on its own, which is why I pair it with molasses extract and cinnamon to build that classic oatmeal cookie taste.

You can find oat fiber online or at specialty baking stores. I buy mine in bulk because I use it in everything from this recipe to my keto sugar cookies. Do not confuse oat fiber with oat flour. Oat flour is finely ground rolled oats and still contains carbs. Oat fiber is the zero-carb hull.

How to get keto sandwich cookies the same size

I learned this the hard way after my first batch came out with one giant cookie sandwiched against a tiny one. The fix is simple: use a cookie scoop. I use a 1.25-inch cookie scoop for every single ball of dough, and they come out uniform every time. If you do not have a scoop, pinch off dough and roll it between your palms to form about a 1-inch ball. I also rotate my baking sheet halfway through so the cookies bake evenly. Once they cool, I match them up by size before piping on the cream filling.

Two sandwich cookies stacked on each other.

How to store these sandwich cookies

I keep these in an airtight container in the fridge, and they stay soft and chewy for 5-7 days. The cream filling stays firm and the cookies hold up without getting soggy. If I am making a big batch, I freeze the assembled pies on a baking sheet first, then transfer them to a freezer bag. They keep in the freezer for up to 2 months. To thaw, I pull one out and let it sit at room temperature for about 15 minutes before eating. The cookie softens back up perfectly.

About the Author
Annie Lampella, Pharm.D.

Annie Lampella, Pharm.D.

Annie is a Doctor of Pharmacy, mom, and the recipe creator behind KetoFocus. With a B.S. in Genetics from UC Davis, she has over 14 years of experience developing family-friendly keto recipes based on the science of human metabolism.

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  1. A
    Amy Mar 14, 2026

    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.

    1. Annie Lampella
      Annie Lampella Mar 18, 2026

      That's the whole goal. The molasses flavor extract is what finally got it there, took a few batches to nail the ratio.

  2. T
    Tasha Mar 11, 2026

    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.

  3. D
    Denise Mar 6, 2026

    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.

    1. Annie Lampella
      Annie Lampella Mar 10, 2026

      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.

  4. D
    Diane Feb 24, 2026

    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?

    1. Annie Lampella
      Annie Lampella Feb 26, 2026

      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.

  5. N
    Nichole Sep 11, 2024

    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

    1. Annie Lampella
      Annie Lampella Sep 15, 2024

      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.

  6. A
    Amanda Miller Jun 16, 2024

    WAY too sweet for my liking, but in small doses, these are a good alternative to the Little Debbie snacks.

    1. Annie Lampella
      Annie Lampella Jun 21, 2024

      Fair. The filling runs very sweet. Cutting the sweetener back by a third or so makes a real difference if you try them again.

  7. D
    Dezirae Feb 9, 2024

    These are absolutely delicious! Thanks for sharing!

  8. J
    Jennifer C Jan 14, 2024

    Be aware that coconut flour is more moist.

    1. Annie Lampella
      Annie Lampella Jan 18, 2024

      Yep, it soaks up liquid fast. That's why I'd only use about 1/4 the amount if swapping it in.

  9. K
    Kristi Wooldridge Nov 22, 2023

    This recipe is amazing!!!! I use the cookie recipe as a crust for my cheesecakes. Y’all!!!! Delicious.

    1. S
      Sylvia Elliott Dec 14, 2023

      Great idea! Thanks! ☺️

  10. S
    shelly Aug 26, 2023

    I am sure you get this question quite often. Do you know a way to make this without almond flour?

    1. Annie Lampella
      Annie Lampella Oct 10, 2023

      I haven't tried to make these without the almond flour. You could try to use lupin flour. The conversion is 1 cup almond flour is equal to 1/2 cup of lupin flour. For coconut flour, the conversion is 1 cup almond flour is equal to about 1/4 cup coconut flour.

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