I just made a Gluten Free Sour Cream Coffee Cake that actually tastes like the real thing and you need to keep scrolling because I’m not exaggerating.

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I’m obsessed with this Gluten Free Sour Cream Coffee Cake because it actually tastes like real cake, not some sad substitute. I love that the crumb sings with butter and tang from 1 cup sour cream and the crumb is richer thanks to 1/2 cup unsalted butter, softened.

But mostly I love grabbing a slice with my morning mug, breaking the crunchy streusel and finding little pockets of cinnamon. It’s messy, flaky, and stupidly satisfying.

And yes, I’ll call it the best Gluten Free Coffee Cake for brunch. No fake promises.

Just good cake. Worth every crumb, trust me seriously.

Ingredients

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Gluten free all purpose flour blend: gives structure and tenderness, basically the cake’s backbone.
Granulated sugar: simple sweetness and light crumb, it browns up nicely.
Light brown sugar: moist, caramel notes; plus it keeps the cake soft.
Baking powder: lifts the cake, makes it airy without being heavy.
Baking soda: helps browning and a little rise, balances the acids.
Fine salt: sharpens flavors, you’ll notice more depth with a pinch.
Ground cinnamon: warm spice in the batter, most goes in the streusel.
Unsalted butter (softened): richness in the cake, makes it tender.
Sour cream: tangy moisture, keeps the cake ridiculously soft.
Large eggs: bind everything together and add some structure.
Vanilla extract: cozy aroma, it smooths out other flavors.
Gluten free flour for streusel: gives that crumbly, rustic topping texture.
Cold butter cubes for streusel: creates those perfect buttery clumps and crunch.
Chopped walnuts or pecans: optional crunch and nuttiness, toasty if you want.
Powdered sugar: for dusting; adds pretty finish and a bit of sweet.

Ingredient Quantities

1 1/2 cups gluten free all purpose flour blend (preferably one with xanthan)

3/4 cup granulated sugar

1/2 cup packed light brown sugar (divided: some for batter, some for streusel)

2 teaspoons baking powder

1/2 teaspoon baking soda

1/2 teaspoon fine salt

1 teaspoon ground cinnamon (divided: some for batter, most for streusel)

1/2 cup unsalted butter, softened (divided: some for batter, some cold for streusel)

1 cup sour cream, room temperature

2 large eggs, room temperature

1 teaspoon vanilla extract

1/2 cup gluten free flour (for streusel)

3 to 4 tablespoons cold unsalted butter, cut into small cubes for streusel

Optional: 1/2 cup chopped walnuts or pecans, toasted

Optional: powdered sugar for dusting

How to Make this

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1. Preheat oven to 350 F and grease an 8 or 9 inch round or square baking pan, line bottom with parchment if you want easy removal.

2. Make the streusel first so it can chill: in a bowl combine 1/2 cup gluten free flour, 1/4 cup packed light brown sugar, most of the 1 teaspoon ground cinnamon (about 3/4 tsp), a pinch of salt, and 3 to 4 tablespoons cold unsalted butter cut into small cubes. Use a pastry cutter or your fingers to rub the butter into the dry ingredients until you have coarse crumbs with some pea sized pieces. Stir in optional 1/2 cup toasted chopped walnuts or pecans if using. Put streusel in fridge while you make the batter.

3. In a large bowl whisk together 1 1/2 cups gluten free all purpose flour blend, 3/4 cup granulated sugar, 2 teaspoons baking powder, 1/2 teaspoon baking soda, 1/2 teaspoon fine salt and the remaining 1/4 teaspoon cinnamon.

4. Cut 1/2 cup unsalted butter into small pieces and cream it into the dry mix with a hand mixer or wooden spoon until mixture looks slightly sandy and some butter bits remain. This helps give the cake a tender crumb.

5. In a separate bowl whisk 1 cup room temperature sour cream, 2 large room temperature eggs and 1 teaspoon vanilla extract until smooth. Stir in 1/4 cup packed light brown sugar (the portion reserved for the batter) until combined.

6. Add the wet ingredients to the flour and butter mixture and stir just until you no longer see dry streaks. Do not overmix, gluten free batters can get gummy if worked too much.

7. Spread the batter into the prepared pan, smooth the top with a spatula. Sprinkle the chilled streusel evenly over the batter, pressing lightly so it adheres. If you like extra crunchy topping, add a few more streusel crumbs on top.

8. Bake 35 to 45 minutes in the preheated oven until the top is golden and a toothpick inserted in the center comes out with moist crumbs but not raw batter. Ovens vary so start checking at 30 minutes.

9. Cool the cake in the pan on a wire rack for at least 15 minutes, then remove to the rack to finish cooling. Dust with powdered sugar if desired and serve slightly warm with coffee or tea.

10. Leftovers keep well covered at room temperature for 2 days or in the fridge for up to 4 days. Reheat gently in the oven or microwave for a minute to refresh the texture.

Equipment Needed

1. Oven (preheated to 350 F)
2. 8 or 9 inch round or square baking pan, plus parchment paper for easy removal
3. 2 mixing bowls, one large for the batter and one medium for the streusel
4. Measuring cups and spoons (for flour, sugars, butter, etc)
5. Hand mixer or sturdy wooden spoon for creaming the butter into the dry mix
6. Pastry cutter or fork (or your fingers) to rub butter into the streusel
7. Whisk for the wet ingredients and to blend dry ingredients a bit
8. Rubber spatula to spread batter and press streusel evenly
9. Wire cooling rack and a toothpick or cake tester to check doneness

FAQ

Q: Can I make this cake without xanthan gum in my GF flour?

A: Yes, but the texture might be a bit crumbly. If your blend has no xanthan, add 1/4 tsp xanthan gum for this recipe, or use a blend labeled "for baking". If you skip it, press the cake gently when it cools so it holds together better.

Q: Can I use Greek yogurt instead of sour cream?

A: Yep. Full fat Greek yogurt works fine, same amount. It will be slightly tangier and maybe denser, but still tasty. Make sure it's at room temp so it mixes easily.

Q: How do I keep the streusel from sinking into the batter?

A: Use cold butter for the streusel and toss the crumbs gently on top, don’t press them in. If your batter is very thin, chill it in the pan for 10 minutes before adding streusel, that helps it stay on top.

Q: Can I add nuts or fruit?

A: Yes. Fold 1/2 cup chopped toasted walnuts or pecans into the streusel or sprinkle on top. For fruit like blueberries, toss them in a little GF flour first so they don’t sink, and use no more than 1 cup.

Q: How do I tell when the cake is done?

A: Insert a toothpick in the center. It should come out with a few moist crumbs, not wet batter. The edges will pull away slightly from the pan and the top will be golden. If it's browning too fast, tent with foil.

Q: Can I make this ahead or freeze it?

A: Totally. Bake and cool completely, wrap tightly and freeze up to 3 months. Thaw at room temp, then warm in a low oven for 10 minutes to refresh. For make-ahead, bake a day before, stash at room temp in an airtight container.

Delicious Gluten Free Sour Cream Coffee Cake Recipe Substitutions and Variations

Gluten free all purpose flour blend: swap with equal parts Bob’s Red Mill 1-to-1 GF baking flour or King Arthur Measure for Measure GF flour, both usually already have xanthan. If your blend has no xanthan add 1/4 teaspoon xanthan gum per cup of flour.
Sour cream: use the same amount of plain Greek yogurt or a mix of 1/2 cup plain yogurt plus 1/2 cup whole milk to get similar tang and moisture. If you use yogurt, pick full fat for best texture.
Unsalted butter: you can use equal amount of salted butter, just cut back on added salt in the recipe, or substitute 1:1 with a neutral oil like melted coconut oil or vegetable oil for a slightly softer crumb.
Eggs: replace each large egg with 1/4 cup applesauce or 1/4 cup mashed banana for a vegan-ish or egg-free version. For better rise use a commercial egg replacer (follow package amounts) or 3 tablespoons ground flaxseed mixed with 9 tablespoons water for two eggs.

Pro Tips

1. Chill the streusel well before topping the batter. Cold butter gives those nice pea sized crumbs and a crunchy top, so pop it in the fridge while you mix the cake batter. If it warms up it’ll smear into the batter instead of staying crumbly.

2. Use room temperature eggs and sour cream. They blend faster and more evenly so you avoid overmixing, which with gluten free flour can make the cake gummy. If your eggs are cold, drop them in warm water for 5 minutes to take the chill off.

3. Don’t overmix when you combine wet and dry. Stop as soon as you can’t see dry streaks. It’s okay if the batter looks a little lumpy. Overworking makes the crumb dense and chewy instead of tender.

4. Check doneness by feel not just time. Start testing at 30 minutes with a toothpick and also press the top lightly with an oven mitt — it should spring back a bit and the toothpick should come out with moist crumbs, not wet batter. If you want to refresh leftovers, warm slices for a minute in the microwave or 5 to 8 minutes in a 325 F oven to revive the butter in the crumb.