Gluten Free Snickerdoodle Bars

These Gluten Free Snickerdoodle Bars are soft, buttery & loaded with cinnamon sugar. Easy cookie bars that bake in one pan — ready in under 30 minutes!

Well… I have to confess something. I originally made these gluten free snickerdoodle bars as a treat for my kids’ school bake sale, fully intending to send the entire pan out the door. But then I cut one tiny corner piece “just to test” — and three bars later, I was frantically mixing a second batch because the first one wasn’t going to survive until morning.

That’s the kind of dangerous we’re talking about here. These cinnamon bars have that buttery, melt-in-your-mouth softness of a classic snickerdoodle cookie, but in a thick, sliceable bar form that’s somehow even more satisfying. The cinnamon sugar topping caramelizes slightly during baking and creates this gorgeous, crackly sweetness on every square.

And really, who doesn’t need a dessert that comes together in one bowl, bakes in one pan, and requires absolutely zero chilling or scooping? These cookie bars are the answer to every busy weeknight craving and every holiday dessert table that needs something special without the stress. According to King Arthur Baking’s guide to cream of tartar in baking, that small addition of cream of tartar is what gives snickerdoodles their signature tangy flavor and chewy texture — and it works beautifully in bar form too.

Why These Gluten Free Snickerdoodle Bars Are a Total Game-Changer

Traditional snickerdoodle cookies require rolling dough balls, coating each one individually, and baking multiple batches. These cinnamon bars skip all of that. You press the dough into a pan, sprinkle the cinnamon sugar on top, and let the oven do the rest.

The texture is where these really shine. The combination of butter and shortening creates a bar that’s as tender and pillowy as a freshly baked biscuit, with edges that turn slightly golden and chewy while the center stays soft and almost blondie-like. It’s the best of both worlds — cookie and bar, merged into one irresistible treat.

For anyone new to gluten-free baking, these cookie bars are incredibly forgiving. The dough comes together quickly, the ingredients are simple, and the results are consistently wonderful even if your measuring isn’t perfectly precise. This is a confidence-building recipe through and through.

Ingredients

Here’s everything you need for these gluten free snickerdoodle bars. I’ve broken it into two parts — the bar base and the cinnamon sugar topping.

For the Snickerdoodle Bars

Ingredient	Amount
Unsalted butter, at room temperature	60 g
Shortening	60 g
Light brown sugar	150 g
Granulated white sugar	50 g
Large egg, at room temperature	1
Large egg yolk, at room temperature	1
Vanilla extract	1 teaspoon
Gluten-free multipurpose flour	150 g
Cornstarch	15 g
Baking powder	1 teaspoon
Cream of tartar	¼ teaspoon
Kosher salt	½ teaspoon

For the Cinnamon Sugar Topping

Ingredient	Amount
Granulated sugar	45 g
Ground cinnamon	1–2 teaspoons

Yield: 9–16 bars (depending on how you cut them)

Room temperature matters: Getting your butter, shortening, and eggs to room temperature before starting makes a real difference in how smoothly the dough comes together. Cold ingredients can create a lumpy batter that doesn’t spread evenly in the pan. Set everything out about 30 minutes before you begin.

Instructions

Step 1: Preheat and Prep

Preheat your oven to 350°F. Line an 8×8 (or 9×9) baking pan with parchment paper, leaving some overhang on the sides — this makes lifting the finished cinnamon bars out of the pan effortless. Set the prepared pan aside.

Step 2: Whisk the Dry Ingredients

In a small bowl, combine the gluten-free flour, cornstarch, baking powder, cream of tartar, and kosher salt. Whisk everything together until evenly blended and set aside. This pre-mixing ensures the leaveners and starch distribute evenly throughout your cookie bars rather than clumping in one spot.

Step 3: Cream the Butter and Sugars

In the bowl of a stand mixer fitted with the paddle attachment (or a large bowl with a handheld mixer), cream together the softened butter and shortening until smooth and combined. Add the granulated white sugar and light brown sugar, then continue beating for 3–4 minutes until the mixture turns noticeably lighter in color and fluffy in texture. This step builds air into the dough, which is what makes your gluten free snickerdoodle bars so tender and soft.

Step 4: Add the Eggs and Vanilla

With the mixer running on low speed, add the egg, egg yolk, and vanilla extract. Let everything incorporate fully — about 30 seconds of mixing. Pause the mixer and scrape down the sides of the bowl with a spatula to make sure nothing is hiding unmixed at the bottom. The batter should look smooth, creamy, and slightly glossy at this stage.

Step 5: Combine Wet and Dry

Add the dry ingredient mixture to the bowl and mix on low speed until a smooth, thick dough forms. Don’t overmix — just blend until you can’t see any dry flour pockets remaining. The dough will be soft and slightly sticky, which is exactly what you want for chewy, tender cinnamon bars.

Step 6: Spread into the Pan

Transfer the dough to your prepared parchment-lined pan. Using a small offset spatula or the back of a spoon, smooth the dough into an even layer that reaches all four corners. Take your time here — an even layer means evenly baked gluten free snickerdoodle bars with no thin, crispy edges and no thick, underdone center.

Step 7: Add the Cinnamon Sugar

In a small bowl, stir together the granulated sugar and ground cinnamon until well combined. Sprinkle the cinnamon sugar mixture evenly across the entire surface of the dough. The generous dusting should cover the top completely — this is what creates that signature snickerdoodle sparkle and crunch. The kitchen will already smell like a cinnamon dream at this point.

Step 8: Bake

Slide the pan into your 350°F oven and bake for 20–22 minutes. The bars are done when the edges are set and golden brown and the center is just barely set — it should look slightly underdone but not jiggly. Pulling them at this moment is the key to that soft, almost fudgy center that makes these cookie bars so special.

Step 9: Cool and Cut

Remove the pan from the oven and place it on a cooling rack. Let the bars cool in the pan for 10 minutes — they’ll continue to firm up during this time. Use the parchment overhang to lift the entire slab onto a wire rack to cool completely. Once fully cooled, cut into 9 large squares or 16 smaller pieces with a sharp knife. The bars should slice cleanly with soft, tender edges — as delicate and buttery as a shortbread, but with that gorgeous cinnamon warmth running through every bite.

Smart Substitutions for These Cinnamon Bars

Butter Alternatives: If you need to go dairy-free, swap the unsalted butter for an equal amount of dairy-free butter like Miyoko’s or Earth Balance. The shortening in this recipe is already dairy-free, so you’re only changing one ingredient. The flavor shifts very slightly, but the texture of these gluten free snickerdoodle bars remains beautifully soft and tender.

Shortening Swap: If you prefer an all-butter bar, replace the shortening with an equal weight of softened unsalted butter. The bars will spread a touch more and have a richer, more buttery flavor. Shortening contributes to a slightly chewier texture, so it’s a trade-off — both versions are delicious.

Flour Options: Any quality gluten-free 1:1 baking flour works here — Bob’s Red Mill, King Arthur Measure for Measure, and Cup4Cup are all reliable choices. Make sure your blend includes xanthan gum, or add ½ teaspoon separately if it doesn’t. The cornstarch in the recipe provides extra tenderness, so don’t skip it regardless of which flour you choose.

Egg Replacement: For egg-free cookie bars, flax eggs can replace both the whole egg and the yolk. Use 1 tablespoon ground flaxseed + 3 tablespoons water for the whole egg, and 1 teaspoon flaxseed + 1½ tablespoons water for the yolk. The texture will be slightly denser but still very enjoyable.

Sugar Adjustments: Coconut sugar can replace the brown sugar for a lower-glycemic option with a deeper, more caramel-like flavor. The cinnamon sugar topping works with any granulated sweetener, including monk fruit blends if you’re watching sugar intake.

Troubleshooting Tips for Perfect Gluten Free Snickerdoodle Bars

Bars too dry or crumbly? You know… this usually means they overbaked by a few minutes. Gluten-free baked goods go from perfect to dry very quickly, so start checking at the 18-minute mark. The center should look barely set — almost underdone — when you pull them out. They firm up significantly during cooling.

Dough too sticky to spread? Lightly dampen your offset spatula or the back of your spoon before pressing the dough into the pan. The moisture prevents sticking and makes it much easier to create an even layer. You can also press a piece of parchment paper on top and use your hands to smooth everything flat.

Center sinking or underdone? Make sure your baking powder is fresh — expired leaveners won’t give these cinnamon bars the lift they need. Also verify your oven temperature with a thermometer, since ovens that run cool can leave the center underbaked while the edges overdevelop. According to the Celiac Disease Foundation’s guide to successful gluten-free baking, precise temperatures are especially important with GF recipes since alternative flours behave differently than wheat flour.

Cinnamon sugar sliding off? Press the topping gently into the dough surface with your fingertips after sprinkling. A light touch helps the sugar adhere to the soft dough without compacting it. The sugar will meld with the surface as the bars bake, creating that gorgeous crackly finish.

Storage & Meal Prep Advice

Storing Baked Bars: Once fully cooled, store your gluten free snickerdoodle bars in an airtight container at room temperature for up to 5 days. Layer parchment paper between rows to prevent the cinnamon sugar topping from sticking. They stay soft and tender for days, though I’d be impressed if they actually last that long in your house.

Freezing: These cookie bars freeze beautifully for up to 3 months. Wrap individual squares in plastic wrap and place in a freezer bag, pressing out excess air. They thaw at room temperature in about 20 minutes — perfect for grabbing a quick treat whenever the craving strikes.

Meal Prep for Events: The dough can be pressed into the pan and covered tightly with plastic wrap, then refrigerated for up to 24 hours before baking. Add the cinnamon sugar topping right before it goes into the oven for the freshest look. This make-ahead approach is ideal for Thanksgiving or Christmas cookie platters when your oven schedule is already packed. If you’re building a full holiday baking lineup, our irresistible gluten-free donuts are another crowd-pleasing option that preps easily in advance.

Serving Suggestions & Pairings

These gluten free snickerdoodle bars are stunning on their own, but they also play beautifully with a few extras. A light dusting of powdered sugar over the cooled bars adds an elegant touch for holiday gifting or a dessert table presentation. Stacked in a mason jar with a ribbon, they make a gorgeous homemade gift.

For an over-the-top dessert experience, serve a warm bar topped with a scoop of vanilla ice cream and a drizzle of caramel sauce. The warm cinnamon against the cold, creamy ice cream is pure heaven. A warm mug of spiced chai or a glass of cold milk are both classic companions.

These cinnamon bars are also wonderful sliced into smaller pieces and served as part of a dessert board alongside fresh fruit, chocolate, and nuts. For a savory-sweet contrast, pair your dessert spread with something unexpected like our zesty homemade gluten-free pico de gallo with chips — guests love having both options available.

Variations & Dietary Adjustments

Kid-Friendly Sprinkle Bars: Press colorful sprinkles into the cinnamon sugar topping before baking for a festive touch that kids absolutely adore. The sprinkles add a fun visual pop without changing the flavor of the cookie bars. Let little ones help with the sprinkling step — it’s the perfect low-stakes kitchen activity for tiny hands.

Dairy-Free Version: Swap the butter for dairy-free butter and you’re done — the shortening is already dairy-free. Everything else in these gluten free snickerdoodle bars is naturally free of dairy. The result is indistinguishable from the original, which makes this recipe perfect for mixed dietary needs at gatherings.

Man, oh man… the Brown Butter Upgrade: Brown the butter before creaming it with the shortening for a nutty, toffee-like depth that takes these cinnamon bars to a whole new level. Just melt the butter in a small saucepan over medium heat until it turns golden and smells toasty, then let it cool and solidify before using. The extra 10 minutes of effort is absolutely worth it for the flavor payoff.

Cream Cheese Swirl: Drop teaspoons of softened cream cheese (or dairy-free cream cheese) across the surface of the dough before adding the cinnamon sugar and use a toothpick to create a marbled pattern. The tanginess of cream cheese against the warm cinnamon creates a gorgeous flavor contrast. This variation is a showstopper for parties.

Chocolate Chip Addition: Fold ½ cup of gluten-free chocolate chips into the dough before pressing it into the pan for a snickerdoodle-meets-cookie-bar hybrid. The melted chocolate pockets add richness that balances the cinnamon beautifully. Our complete collection of gluten-free stuffed bell peppers is proof that simple additions can transform a base recipe — the same principle applies here with chocolate chips.

Gluten Free Snickerdoodle Bars FAQs

One Pan, All the Cinnamon Magic

Baking should feel joyful, not stressful — and these gluten free snickerdoodle bars are exactly the kind of recipe that brings that joy back into the kitchen. One bowl, one pan, thirty minutes, and a batch of warm, cinnamony squares that disappear faster than you can cut them. Simple ingredients, incredible flavor, and the kind of recipe that makes gluten-free baking feel effortless.