Leo
When my sister found out she had to stop eating gluten, I watched her throw away a brand-new box of bakery pastries and practically cry. I told her I would bake her something just as good. I was completely lying. My first few attempts at gluten-free baking tasted like sweet, gritty sawdust. They crumbled into ash the second you looked at them.
It took me six different batches to figure out how to make a Gluten Free Cinnamon Coffee Cake that doesn’t just taste “good for being gluten-free,” but actually tastes like a legitimate, heavy, buttery bakery cake.
The secret to this cake is entirely in the moisture. Gluten-free flours act like sponges. If you use a standard cake recipe and just swap the flour, the cake will choke you. You have to add heavy, fat-based moisture. In this case, sour cream.
I served this to a house full of people on Thanksgiving morning, and absolutely nobody knew it was gluten-free until I told them. The crumb topping is incredibly thick. The cake is dense but soft, and there is a massive ribbon of cinnamon sugar running right through the center.
If you are looking for a show-stopping breakfast that everyone in the family can actually eat, this is your answer. If you want something a bit fruitier, I highly recommend checking out my Blueberry Cheesecake Crumb Cake (which you can also make with gluten-free flour using these same tricks). If you need a fast breakfast you can throw in your car, make my Easy Healthy Breakfast Bars.
☕ Bake Time · Gluten-Free · 9 Squares
Prep time: 20 min · Bake time: 45 min · Calories: 380 kcal
The Nutrition Breakdown
Gluten-free does not mean calorie-free. This is a heavy, buttery, indulgent coffee cake. It is meant for weekends and holidays. Here is the estimated breakdown per slice (assuming you cut the 8×8 pan into 9 large squares):
- Calories: 380
- Protein: 4g
- Carbohydrates: 52g
- Dietary Fiber: 1.5g
- Total Sugars: 31g
- Fat: 18g
- Saturated Fat: 11g
- Sodium: 210mg
If you want to cut the sugar down slightly, you can reduce the white sugar in the cake batter by a quarter cup. Do not touch the brown sugar in the crumb topping. That is structurally necessary.
The Right Tools for the Job
You do not need anything fancy, but you do need to follow the rules of the pan.
The Pan: Use an 8×8-inch square metal baking pan. Do not use glass. Glass takes way too long to heat up, which means the edges of your cake will be dry and hard by the time the center finally finishes baking. Metal heats up fast and bakes evenly.
The Paper: You have to use parchment paper. Gluten-free baked goods are notoriously fragile when they are warm. If you try to dig this out of an unlined pan with a spatula, you will rip the bottom half of the cake entirely off. Line the pan, leave an overhang on the sides, and lift the whole thing out like a hammock when it is cool.
The Mixer: A simple electric hand mixer is perfect. You need to beat the butter and sugar until it’s fluffy. Doing this by hand with a wooden spoon is a miserable workout.
The Ingredient Lineup
For the Cinnamon Streusel:
* 1 cup gluten-free 1-to-1 baking flour
* 1 cup packed dark brown sugar
* 1 tablespoon ground cinnamon
* 1/2 cup (1 stick) cold unsalted butter, cubed
* A pinch of salt
For the Cake Batter:
* 1 1/2 cups gluten-free 1-to-1 baking flour
* 3/4 cup granulated sugar
* 1/2 cup (1 stick) unsalted butter, softened
* 2 large eggs, room temperature
* 1/2 cup full-fat sour cream (or plain whole milk Greek yogurt)
* 1/4 cup whole milk
* 1 teaspoon vanilla extract
* 1 1/2 teaspoons baking powder
* 1/2 teaspoon baking soda
* 1/2 teaspoon salt
The Flour: This is the most critical ingredient in the entire recipe. You must use a “1-to-1” or “Measure-for-Measure” gluten-free flour blend that specifically contains *xanthan gum*. Brands like Bob’s Red Mill or King Arthur are great. If your flour does not have xanthan gum, the cake will literally crumble into dust when you cut it. Do not use almond flour or coconut flour. They behave completely differently and will turn this into a wet brick.
The Sour Cream: This is the magic ingredient. Gluten-free flour absorbs massive amounts of liquid. Sour cream adds fat and dense moisture that won’t bake out in the oven. Do not use low-fat sour cream. You need the fat.
The Butter: Pay attention to the temperatures. The butter for the cake batter needs to be softened (room temperature). The butter for the streusel topping must be rock cold. If you use soft butter for the topping, it will melt into a greasy paste instead of baking into crunchy little crumbs.
Mix, Layer, Bake
1. Make the streusel first.
In a medium bowl, whisk together the gluten-free flour, dark brown sugar, cinnamon, and salt. Drop in your cubes of cold butter.
Use your hands to pinch and rub the butter into the dry ingredients. Keep squeezing it until it looks like wet, clumpy sand and holds together when you squeeze a handful. Put this bowl in the fridge so the butter stays cold while you make the batter.
2. Cream the butter and sugar.
In a large bowl, use your electric mixer to beat the softened butter and granulated sugar together for a full two minutes. It should look pale and fluffy. Add the eggs one at a time, beating just until they disappear. Then mix in the vanilla extract, sour cream, and milk.
3. Add the dry stuff.
Dump the gluten-free flour, baking powder, baking soda, and salt right into the wet mix. Mix it on low speed. Stop the exact second you stop seeing dry flour. Do not overbeat it. The batter is going to be extremely thick. It will look more like drop-biscuit dough than liquid cake batter. This is perfectly normal.
4. Build the layers.
Take your parchment-lined 8×8 pan. Scoop exactly half of the thick cake batter into the bottom.
Use a silicone spatula to spread it out into a flat layer. It will be sticky and annoying. Just take your time.
Now, grab your chilled streusel. Sprinkle exactly half of it evenly over the bottom layer of batter.
Next, carefully drop spoonfuls of the remaining cake batter over the streusel. Use your spatula to very gently spread it out. If you push too hard, you will drag the cinnamon sugar through the batter and ruin the layer.
5. Top it off.
Dump the rest of the streusel over the top. Press it down very lightly with your hands so it sticks to the batter.
6. Bake.
Bake at 350°F (175°C) for 45 to 55 minutes. You know it is done when a toothpick inserted into the center comes out clean, or with just a few moist crumbs attached.
Pull it out of the oven. Do not touch it. You must let this cool in the pan for at least 45 minutes before you try to lift it out. Gluten-free cakes are incredibly fragile when they are hot.
What I Got Wrong First
My very first attempt at this was a tragic failure. I bought a cheap bag of gluten-free flour from the bottom shelf of the grocery store. I didn’t read the label. It didn’t have xanthan gum in it. When I pulled the cake out of the oven and tried to cut it, the entire thing shattered into a million tiny, dry crumbs. I had to eat it with a spoon. Xanthan gum acts like the glue that holds the cake together. Make sure it’s in your blend.
Second mistake: I overbaked it. Gluten-free flour dries out much faster than regular wheat flour. I left it in the oven for an hour because the top looked a little pale. The result tasted like stale bread. Check your cake at the 45-minute mark. If the toothpick is clean, get it out of the hot oven immediately.
Quick Cake Troubleshooting
Why did my streusel sink to the bottom?
Your batter was too thin. This happens if you used too much milk or if you accidentally melted your butter instead of just softening it. Coffee cake batter needs to be stiff enough to hold up a heavy blanket of sugar.
Why is my cake gummy in the middle?
You either pulled it out of the oven too early, or you cut into it while it was still piping hot. Gluten-free baked goods actually continue to cook and set up as they cool down on the counter. If you cut it while it’s steaming, the starches inside are still wet and gummy. You have to wait.
My crumb topping melted into a flat glaze, what happened?
Your butter for the streusel was too warm. If the butter is soft when it goes into the oven, it just melts over the cake like a syrup. The butter must be fridge-cold when you mix it with the brown sugar so it bakes into crunchy little rocks.
Make-Ahead Baking Schedule
Gluten-free baked goods have a famously short shelf life before they start tasting like cardboard. But you can easily game the system if you are hosting.
The Night Before: Make the streusel topping completely. Put it in a Ziploc bag and leave it in the fridge overnight. In a separate bowl, whisk all your dry cake ingredients together and leave them on the counter. In the morning, all you have to do is mix the wet ingredients, fold in the dry, layer it up, and bake. You save yourself a ton of dishes on a busy morning.
Freezing the Cake: This cake freezes beautifully. Once it is completely cooled, lift it out of the pan and cut it into squares. Wrap each square individually in plastic wrap, then put them in a large freezer bag. They will keep for two months. When you want a slice, just unwrap it and microwave it for 30 seconds. It tastes like it just came out of the oven.
Variations and Tweaks
The Pecan Upgrade: If you love nuts in your breakfast cakes, chop up one cup of raw pecans and mix them directly into the streusel topping before you layer it. The toasted, buttery pecans are incredible. If you are a huge pecan fan, you should absolutely check out my Simple Pecan Pie Dump Cake next.
Apple Cinnamon Cake: Peel and dice one large Granny Smith apple into very small cubes. Fold the apple chunks directly into the cake batter right before you put it in the pan. The tart apples cut through the heavy brown sugar perfectly.
Vanilla Glaze: If you want to make this look like it came from a coffee shop window, whisk together 1 cup of powdered sugar and 2 tablespoons of milk. Drizzle it over the completely cooled cake right before serving.
Storing Leftovers
Do not put this cake in the fridge. The cold air will suck the moisture right out of the gluten-free flour and make it stale overnight.
Keep it in an airtight Tupperware container right on your kitchen counter. It will stay soft for about 3 days (thanks to the sour cream). If you have leftovers past day three, move them to the freezer.
Gluten Free Cinnamon Coffee Cake
Heavy, buttery, bakery-style crumb that actually tastes like coffee cake — not sawdust. Sour cream keeps GF flour moist, and a massive dark-brown-sugar streusel runs through the center and piled on top.
Ingredients 01
Must be “1-to-1” / “Measure-for-Measure” with xanthan gum (Bob’s, King Arthur). Xanthan is the glue — without it the cake shatters into dusty crumbs you eat with a spoon. Never almond or coconut flour — they make a wet brick. And keep streusel butter fridge-cold vs. batter butter softened.
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How to Cook 02
Whisk 150g GF flour + 200g dark brown sugar + 1 Tbsp cinnamon + pinch salt. Drop in 113g cold cubed butter. Pinch and rub with hands until wet, clumpy sand that holds when squeezed. Fridge it while you make batter — cold = crunchy rocks, warm = greasy glaze.
Beat 113g softened butter + 150g granulated sugar with hand mixer 2 min until pale and fluffy. Add 2 eggs one at a time, beating just until gone, then mix in 1 tsp vanilla + 120g sour cream + 60ml whole milk.
Add 225g GF flour + 1 ½ tsp baking powder + ½ tsp soda + ½ tsp salt. Mix on low and stop the second no dry flour shows — don’t overbeat. Batter will be extremely thick like drop-biscuit dough — that’s correct. GF flour is a sponge.
Line 8×8-inch metal pan (not glass) with parchment, leaving overhang hammock. Scoop exactly half the batter and spread flat with silicone spatula — sticky, take your time. Sprinkle half the chilled streusel evenly over it.
Drop spoonfuls of remaining batter over streusel, gently spread — don’t push hard or you’ll drag cinnamon through. Dump rest of streusel on top and press very lightly so it sticks.
Bake at 350°F (175°C) 45–55 min — toothpick in center should come out clean or with a few moist crumbs. Check at 45 — GF dries out fast if overbaked. Pull and cool in pan 45 min minimum before lifting hammock out. Hot GF cake is super fragile and gummy if cut steaming; it keeps setting as it cools.
Notes 03
Metal 8×8, not glass — glass heats slow, edges dry before center bakes. Parchment with overhang is mandatory — warm GF cake rips if you pry with a spatula. Lift the whole slab out when cool.
My first flop: cheap GF flour with no xanthan gum — cake shattered into spoon-only crumbs. Xanthan is the binder. If your blend lacks it, add ¾ tsp xanthan gum. Don’t swap almond/coconut.
Streusel = cold cubed → crunchy rocks. Batter = softened → fluffy. Reversed = greasy puddle on top or gluey batter. Full-fat sour cream / whole-milk yogurt only — low-fat won’t moisten GF sponge.
Streusel sank? Batter too thin — melted butter or too much milk; batter must be stiff enough to hold sugar blanket. Gummy center? Pulled too early or cut steaming — wait for cool-set. Topping melted flat? Butter was warm going in.
Pecan Upgrade: stir 1 cup chopped raw pecans into streusel — buttery crunch; pecan lovers see Simple Pecan Pie Dump Cake. Apple Cinnamon: fold 1 large diced Granny Smith into batter. Vanilla Glaze: whisk 1 cup powdered sugar + 2 Tbsp milk, drizzle over fully cooled cake.
Night before: bag streusel → fridge; whisk dry batter ingredients → counter. Morning just mix wet + fold. Freeze beautifully: cool completely, lift, cut 9 squares, wrap each in plastic + freezer bag — 2 months; microwave 30 sec to taste fresh-baked. Don’t refrigerate — fridge dries GF flour to cardboard; keep airtight on counter 3 days.
Nutrition 04
| Nutrient | Per Slice (1 of 9) |
|---|---|
| Calories | 380 kcal |
| Protein | 4 g |
| Carbohydrates | 52 g |
| Fiber | 1.5 g |
| Sugar | 31 g |
| Fats | 18 g |
| Saturated Fat | 11 g |
| Sodium | 210 mg |
One 8×8 pan cut into 9 large squares. Estimated — varies with GF flour brand and butter. Heavy, indulgent — weekends/holidays, not calorie-free because it’s gluten-free.
Allergens: dairy (butter, sour cream, milk), egg. Gluten-free when using certified GF 1-to-1 flour with xanthan gum. Check labels for cross-contact if celiac.
Breakfast cousins: Blueberry Cheesecake Crumb Cake · Easy Healthy Breakfast Bars · Simple Pecan Pie Dump Cake
