Gluten-Free Peach Melba Crumb Cake

Sweet, fruity, and topped with a buttery crumb — this gluten-free peach melba crumb cake serves 9–12 and is ready in under an hour.

The first time I brought a gluten-free crumb cake to a summer cookout, I held my breath the whole drive over. I’d already had two batches crumble apart on me before I figured out the right flour ratio. When people started asking for seconds — and then the recipe — I knew I’d finally cracked it.

That’s exactly how this gluten-free peach melba crumb cake was born. It layers juicy peaches and fresh raspberries between a tender vanilla cake and a cinnamon crumb topping that shatters just right. Well… it’s the kind of brunch cake that makes everyone forget they’re eating gluten-free.

Sound too good to be true? Keep reading — I’m going to walk you through every step so you get it right on the first try.

Why You’ll Love This Gluten-Free Peach Melba Crumb Cake

• Tender, moist crumb — sour cream keeps the cake soft and rich even without gluten
• Beginner-friendly — no stand mixer required, and the assembly is forgiving
• Naturally adaptable — easily made dairy-free with a few simple swaps
• Perfect for brunch or summer entertaining — holds up beautifully at room temperature for hours

The Secret to Perfect Gluten-Free Peach Melba Crumb Cake

Gluten-free baking fails when the structure is ignored. Gluten normally creates the network that holds cake together — without it, you need fat and starch to do that job.

• Sour cream is non-negotiable. It adds fat and acidity, tenderizing the crumb while activating the baking soda for a proper rise.
• Cold butter in the topping matters. Cutting in cold, cubed butter creates pea-sized crumbs that stay distinct during baking rather than melting into a paste.
• Cornstarch in the fruit layer prevents sogginess. It absorbs the juices released by the peaches and raspberries so your cake base stays firm.
• Refrigerating the crumb topping while you prep the batter keeps it from softening before it hits the oven.

Ingredients

For the Crumb Topping

Ingredient	Amount	Notes
Gluten-free all-purpose flour	¾ cup	Use a blend with xanthan gum
Brown sugar	⅓ cup	Packed
Ground cinnamon	½ tsp
Salt	¼ tsp
Cold unsalted butter, cubed	5 tbsp	Keep refrigerated until use

For the Cake

Ingredient	Amount	Notes
Gluten-free all-purpose flour	1½ cups	Same blend as topping
Baking powder	1 tsp
Baking soda	½ tsp
Salt	¼ tsp
Unsalted butter, softened	½ cup	Room temperature
Granulated sugar	¾ cup
Large eggs	2
Vanilla extract	1 tsp
Sour cream or Greek yogurt	½ cup	Full-fat for best texture
Milk	2 tbsp	Any milk works

For the Peach Melba Layer

Ingredient	Amount	Notes
Large peaches, peeled and diced	2	Ripe but firm
Fresh raspberries	1 cup	Frozen works; don’t thaw
Cornstarch	1 tbsp	Thickens the fruit juices
Granulated sugar	1 tbsp
Lemon juice	1 tsp	Brightens the fruit flavor

Optional Glaze

Ingredient	Amount
Powdered sugar	½ cup
Milk or lemon juice	1–2 tbsp

Step-by-Step Instructions

Step 1: Prepare the Oven

Preheat your oven to 350°F (175°C). Grease an 8-inch square baking pan and line it with parchment paper, leaving overhang on two sides for easy lifting later.

Step 2: Make the Crumb Topping

In a medium bowl, whisk together the gluten-free flour, brown sugar, cinnamon, and salt. Add the cold cubed butter and use a fork or pastry cutter to cut it in until coarse, shaggy crumbs form — think small gravel, not fine sand.

Pop the bowl in the refrigerator while you prep everything else. This keeps the crumbs distinct and ensures a crunchy, golden topping rather than a greasy one.

Step 3: Prepare the Fruit Layer

In a small bowl, toss the diced peaches and raspberries with the cornstarch, sugar, and lemon juice. The cornstarch will look chalky at first — that’s fine. It dissolves into a silky glaze once it hits the oven heat.

Pro Tip: Don’t let the fruit mixture sit longer than 15 minutes or it’ll start releasing too much liquid before you even assemble.

Step 4: Make the Cake Batter

In a large bowl, beat the softened butter and granulated sugar together until light and fluffy — about 2–3 minutes. You want the mixture to look almost pale yellow and feel airy when you scrape the bowl.

Add the eggs one at a time, mixing well after each addition. Then mix in the vanilla extract and sour cream until fully combined.

In a separate bowl, whisk together the gluten-free flour, baking powder, baking soda, and salt. Gradually fold the dry ingredients into the wet mixture, then stir in the milk until a smooth batter forms.

Pro Tip: Don’t overmix after adding the flour. Overworking gluten-free batters can make the texture dense and gummy.

Step 5: Assemble the Cake

Spread the batter evenly into the prepared pan using an offset spatula or the back of a spoon. Spoon the peach-raspberry mixture over the batter in an even layer. Scatter the chilled crumb topping evenly over the fruit.

Step 6: Bake

Bake for 40–45 minutes, until the topping is golden brown and a toothpick inserted into the cake portion (not the fruit) comes out clean. The edges will smell nutty and caramelized — that’s your cue it’s nearly done.

Cool in the pan for at least 20 minutes before removing. This resting time allows the fruit layer to set so slices hold their shape cleanly.

Step 7: Add the Glaze (Optional)

Whisk together the powdered sugar with 1–2 tablespoons of milk or lemon juice until a pourable glaze forms. Drizzle over the fully cooled cake right before serving. A lemon juice glaze adds a tart brightness that plays beautifully against the sweet peaches.

Make It Your Own

To make this a dairy-free gluten free crumb cake, swap the butter for vegan butter (stick style, not spread), the sour cream for full-fat coconut yogurt, and the milk for oat milk. The texture stays nearly identical — just slightly less rich.

You know… frozen peaches work surprisingly well here in winter when fresh stone fruit isn’t available. Thaw them completely and drain off the excess liquid before tossing with the cornstarch and sugar. The flavor deepens beautifully.

Want to lean harder into the peach melba dessert profile? Stir a tablespoon of raspberry jam into the fruit layer along with the fresh raspberries for a more intensely jammy result. It’s also gorgeous layered into individual ramekins for a dinner party presentation.

For a brunch cake variation, skip the glaze and dust the finished cake with powdered sugar instead. It photographs beautifully and feels a little more rustic — perfect for a lazy Sunday morning table spread.

Common Problems and Solutions

Problem: The cake is gummy in the center. This usually means the cake was underbaked or the gluten-free flour blend used doesn’t contain xanthan gum. Always test with a toothpick in the cake layer, not the fruit, and use a flour blend labeled “measure for measure” or “cup for cup.”

Problem: The crumb topping sinks into the fruit. This happens when the topping is too warm before it goes into the oven. Make sure you refrigerate the crumbs while mixing the batter — even 10 minutes of chilling makes a significant difference.

Man, oh man… Problem: The fruit layer is too watery. If your peaches are very ripe and juicy, increase the cornstarch to 1½ tablespoons. You can also let the tossed fruit sit in a strainer for 5 minutes to drain off some liquid before layering.

Problem: The crumb topping is too dry and doesn’t hold together. Add ½ teaspoon of water at a time, tossing gently, until the crumbs just begin to clump. You’re looking for something between dry sand and wet dough — loose clumps that hold their shape when pressed.

Storage and Meal Prep

Method	Duration	Notes
Counter	1–2 days	Cover loosely; avoid airtight or crumb softens
Refrigerator	4–5 days	Bring to room temperature before serving
Freezer	Up to 2 months	Wrap individual slices tightly in plastic, then foil

To reheat from the fridge, pop a slice in a 300°F oven for 8–10 minutes. This refreshes the crumb topping and warms the fruit layer without drying out the cake.

Leftover crumbles from the topping? Sprinkle them over Greek yogurt or oatmeal the next morning for a zero-waste breakfast that feels like dessert.

Serving Suggestions

This gluten-free peach melba crumb cake is stunning served slightly warm alongside a scoop of vanilla ice cream or a dollop of whipped cream. The contrast of warm fruit and cold cream is like sunshine melting through a summer afternoon.

It’s become my go-to for Fourth of July brunches and Labor Day cookouts — the red-and-gold color combination from the raspberries and peaches looks almost festive without any effort.

Round out your spread with these from the Grainless Life kitchen: the bright, refreshing gluten-free coconut lime granita makes a perfect palate cleanser, or try the buttery gluten-free lemon poppy seed cookie bars for a citrusy companion on the dessert table.

If peaches are your thing this season, don’t miss the savory-sweet gluten-free peach burrata crostini — it’s a stunning starter before this cake steals the show.

Gluten-Free Peach Melba Crumb Cake FAQs

Final Thoughts

This gluten-free peach melba crumb cake is the kind of recipe that earns a permanent spot in your rotation. It’s straightforward, genuinely crowd-pleasing, and gives you that satisfying crunch-to-fruit-to-cake ratio that most gluten-free bakes never quite nail.

If you make it, I’d love to know how it turned out. Leave a star rating and drop a comment below — especially if you tried a variation. And if you’re sharing to Pinterest, a photo of that golden crumb topping always gets saves.