These oat flour oatmeal cookies are honestly one of my favorite things to bake on a lazy afternoon. I stumbled onto this version a while back when I ran out of all-purpose flour mid-bake and grabbed my bag of oat flour instead. Best accident ever. I’ve been baking with oat-based ingredients for years now, so I had a feeling it would work. And wow, did it work. You get these soft, chewy cookies with the most amazing texture, and the whole thing comes together in under 30 minutes. Everything you need is probably already in your pantry. They’re also naturally gluten-free friendly, which makes them perfect for sharing with pretty much everyone you know.

Why You’ll Love These Oat Flour Oatmeal Cookies

Honestly, there’s so much to like here. Let me just break it down for you:

Ready in just 26 minutes total, start to finish.
Soft and chewy centers every single time, not cakey, not crispy.

Uses simple pantry staples you probably already have on hand.
Gluten-free friendly with one easy swap to certified gluten-free oats.
Makes exactly 16 cookies, perfect for sharing or stashing for later.

No chilling the dough, no complicated steps, no fuss.

These are the kind of cookies you can throw together on a weeknight and still feel like you really did something special.

Ingredients for Oat Flour Oatmeal Cookies

Here’s everything you need to pull these together. Nothing fancy, I promise.

½ cup unsalted butter, at room temperature (not melted, this matters a lot)

⅔ cup granulated sugar
¼ cup packed brown sugar
1 large egg
1 egg yolk
1 teaspoon vanilla
1¼ cups oat flour (this is finely milled oats, not the same as rolled oats)
1¼ cups rolled oats (these are the whole, flat oats that give the cookies their chewy bite)
½ teaspoon ground cinnamon
½ teaspoon baking soda
¼ teaspoon kosher salt

Quick note: oat flour and rolled oats are two totally different things. You need both. One gives structure, the other gives texture. Don’t skip either one.

Ingredient Notes and Substitutions

Room temperature butter is non-negotiable here. Cold butter won’t cream properly, and melted butter will make your dough greasy and flat. Pull it out of the fridge about an hour before you start.

Using both a whole egg and an extra yolk is my favorite trick for chewy cookies. The yolk adds richness and fat without extra liquid, which keeps the centers soft instead of cakey.

Oat flour behaves differently than all-purpose flour. It’s denser and absorbs moisture differently, so don’t try swapping them one for one in other recipes. This recipe is built around oat flour specifically.

For the brown sugar, light brown sugar gives a milder, more subtle flavor. Dark brown works too and adds a deeper molasses note. Either is fine.

If you need these to be strictly gluten-free, use certified gluten-free oat flour and certified gluten-free rolled oats. Regular oats can have cross-contamination issues. And if you only have fine sea salt on hand, use just a tiny bit less than the recipe calls for.

Equipment You Need to Make Oat Flour Oatmeal Cookies

Nothing fancy required here. These are the tools I reach for every single time:

Stand mixer with paddle attachment or a hand mixer
Two sheet pans
Parchment paper or silicone baking mats
Small cookie scoop
Rubber spatula
Wire cooling rack

That cookie scoop is honestly a game changer. It gives you evenly sized cookies every time, which means they all bake at the same rate. No more half-burnt, half-underdone batches.

How to Make Oat Flour Oatmeal Cookies

These come together so fast. Here’s exactly how I do it every time.

Preheat your oven to 350 degrees Fahrenheit. Line two sheet pans with parchment paper or silicone baking mats. Get this done first so your oven is fully up to temperature when the dough is ready.

Cream the butter and sugars. Add the room temperature butter, granulated sugar, and brown sugar to your stand mixer bowl with the paddle attachment. Beat on medium speed for about 3 minutes until the mixture looks pale, light, and fluffy. Don’t rush this step. It matters.
Add the eggs and vanilla. Pour in the vanilla, then add the whole egg and the extra egg yolk. Mix until everything is combined. Now stop and scrape down the sides of the bowl with your spatula. You want every bit of that butter mixture incorporated before the next step.
Add the dry ingredients. Add the oat flour, rolled oats, cinnamon, baking soda, and kosher salt all at once. Beat until a soft cookie dough forms. It will look a little different from a regular cookie dough because of the oat flour, but that’s totally normal.

Scoop the cookies. Use your small cookie scoop to portion out 8 cookies onto each prepared sheet pan. Leave plenty of space between them. These cookies spread, and crowding the pan will cause them to bake into each other.
Bake for 11 minutes. The edges should look golden brown, but the centers will still look underdone and a little soft. That’s exactly what you want. Don’t talk yourself into leaving them in longer.
Cool on the pan for at least 5 minutes. This is important. The cookies keep cooking on the hot pan after you pull them out of the oven, and that’s what sets the centers perfectly. Once they look firm enough to move, transfer them to a wire rack to finish cooling.

Bake the second batch. Repeat with the remaining dough. Enjoy every single one.

Tips for Perfect Oat Flour Oatmeal Cookies

A few things I’ve learned after making these more times than I can count:

Do not overbake. The cookies keep cooking on the hot pan after they come out of the oven. Pull them when the edges are set and the centers still look a little underdone. Trust the process.

Use a cookie scoop every time. Even-sized cookies bake evenly. It’s that simple.
Make sure your butter is truly at room temperature before you start. Press a finger into it. It should leave an indent easily without feeling greasy or slick.
Scrape down the bowl after adding the eggs. Little pockets of unmixed butter hiding at the bottom of the bowl will throw off the whole dough.

Give your cookies room to spread on the pan. Eight per pan is the right number. Don’t try to squeeze in more.
My number one trick for soft, chewy centers is pulling the cookies out when they still look slightly underdone in the middle. Every single time, they firm up perfectly as they cool on the pan. It feels wrong at first, but it works.

Oat Flour Oatmeal Cookies Variations

Once you’ve made the base recipe a couple of times, start playing around with it. These cookies are incredibly forgiving and take mix-ins really well. Here are a few of my favorite ways to switch things up:

Chocolate chips: Stir in about half a cup. They melt into little pockets of sweetness and make the cookies feel extra indulgent.
Raisins or dried cranberries: Classic move. Raisins keep things traditional, while dried cranberries add a little tartness that balances the sweetness beautifully.
Chopped walnuts or pecans: Add a small handful for crunch. Pecans especially give these a warm, almost buttery flavor that pairs so well with the cinnamon.

A pinch of nutmeg: Add it right alongside the cinnamon. It deepens the spice flavor in a really subtle, cozy way.

Don’t be afraid to mix and match. Chocolate chips and walnuts together? Honestly amazing.

Serving Suggestions for Oat Flour Oatmeal Cookies

These cookies are honestly great on their own, but here are a few of my favorite ways to enjoy them:

With a cold glass of milk. Classic for a reason.
Alongside a scoop of vanilla ice cream. Warm cookie, cold ice cream. You can’t go wrong.
Packed into a cookie gift box. They hold up really well and look beautiful stacked together.

As an after-school snack. They’re filling enough to actually tide kids over until dinner.

Personally, I love grabbing one straight off the cooling rack with a cup of tea. That warm, cinnamon-spiced smell alone is worth making a batch.

How to Store Oat Flour Oatmeal Cookies

These cookies keep really well, so don’t worry if you can’t eat them all at once.

Room temperature: Store your cookies in an airtight container for up to 5 days. They stay soft and chewy the whole time.
Freezing baked cookies: Pop them into a freezer-safe bag and freeze for up to 2 months. Just let them thaw at room temperature when you’re ready to eat.
Freezing raw dough: Scoop your dough into balls and freeze them on a sheet pan first. Once solid, transfer to a freezer bag. Bake directly from frozen at 350 degrees Fahrenheit, adding 1-2 extra minutes to the bake time.

Honestly, keeping frozen dough balls on hand is a game changer. Fresh cookies whenever you want them.

Nutrition Information for Oat Flour Oatmeal Cookies

Here’s a breakdown of the estimated nutrition per cookie (based on a yield of 16 cookies):

Calories: 150
Total Fat: 7g
Saturated Fat: 4g
Unsaturated Fat: 2g
Trans Fat: 0g
Cholesterol: 30mg
Sodium: 50mg
Total Carbohydrates: 20g
Fiber: 2g
Sugar: 10g
Protein: 2g

Keep in mind these are estimates. Your actual values may vary depending on the specific brands and ingredients you use.

Frequently Asked Questions About Oat Flour Oatmeal Cookies

Got questions? I’ve got answers. Here are the ones I hear most often about this recipe.

Can I make oat flour oatmeal cookies without a stand mixer?

Yes, absolutely. A hand mixer works just as well. You can even use a bowl and a wooden spoon if that’s what you have, but be ready to put in some real arm work when creaming that butter and sugar together.

Are oat flour oatmeal cookies gluten-free?

Oat flour is naturally gluten-free, but cross-contamination during processing is really common. If you have celiac disease or a gluten intolerance, make sure you’re buying certified gluten-free oat flour and certified gluten-free rolled oats. Don’t skip that step.

Can I use quick oats instead of rolled oats in oat flour oatmeal cookies?

You can, but the texture will be a little different. Quick oats are more finely processed, so your cookies won’t have that same satisfying chew. Rolled oats give you the best results here, so I’d stick with them if you can.

Why do my oat flour oatmeal cookies spread too much?

The most likely culprit is butter that was too warm or even melted before creaming. It can also happen if the cookies were placed too close together on the pan or if your oven runs hot. Try chilling the dough for 15 to 20 minutes before scooping if you keep running into this problem.

Can I make the oat flour oatmeal cookie dough ahead of time?

Yes, and honestly it’s a great idea. Just cover the dough and refrigerate it for up to 48 hours. When you’re ready to bake, add an extra minute or two to the bake time since the dough will be cold going into the oven.

Share Your Oat Flour Oatmeal Cookies

Did you make these oat flour oatmeal cookies? I’d love to hear how they turned out! Drop a comment below and leave a rating so other readers know what to expect. If you snapped a photo, share it on social media and tag me. I genuinely get so happy seeing your bakes. And if you ran into any trouble or have questions about the recipe, just ask. I’m here and I read every single comment.

Oat Flour Oatmeal Cookies That Are Soft and Chewy

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Author: Chef Ivan
Total Time: 26 minutes
Yield: 16 cookies 1x
Diet: Gluten Free

Print Recipe

Description

Delicious oat flour oatmeal cookies that are easy to make.

Ingredients

Scale

½ cup unsalted butter, room temperature
⅔ cup sugar
¼ cup brown sugar
1 large egg
1 egg yolk
1 teaspoon vanilla
1¼ cup oat flour
1¼ cup rolled oats
½ teaspoon ground cinnamon
½ teaspoon baking soda
¼ teaspoon kosher salt

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Instructions

Preheat your oven to 350 degrees Fahrenheit. Line two sheet pans with parchment paper or silicone baking mats.
In the bowl of a stand mixer with the paddle attachment, beat the butter, sugar, and brown sugar until light and fluffy, about 3 minutes.
Add the vanilla, egg, and the egg yolk to the butter mixture and beat until combined. Scrape down the sides of the bowl with a spatula.

Add the oat flour, rolled oats, cinnamon, baking soda, and kosher salt to the butter mixture. Beat until incorporated and a cookie dough forms.
Use a small cookie scoop to scoop 8 cookies onto each prepared sheet pan. Give the cookies space to spread!
Place the sheet pans in the oven and bake for 11 minutes, or until the edges are golden brown but the centers look underdone.

Remove the cookies from the oven and let them cool on the pans for at least 5 minutes. Once they are set up and easy to transfer, move them to a wire rack to cool completely.
Repeat with the remaining cookie dough. Enjoy!

Notes

Use gluten-free rolled oats if you’re gluten intolerant.
Store cookies in an airtight container to maintain freshness.

Prep Time: 15 minutes
Cook Time: 11 minutes
Category: Dessert
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 cookie
Calories: 150
Sugar: 10g
Sodium: 50mg
Fat: 7g
Saturated Fat: 4g
Unsaturated Fat: 2g
Trans Fat: 0g
Carbohydrates: 20g
Fiber: 2g
Protein: 2g
Cholesterol: 30mg