One-Bowl Dark Chocolate Raspberry Cake
This dark chocolate raspberry cake comes together in one bowl with a whisk and a handful of ingredients. It’s the kind of dessert that feels fancy without tasting like it took all afternoon.
The crumb is tender and deeply chocolatey, speckled with fresh raspberries that turn soft and jammy as it bakes. A quick poured chocolate glaze sets into a glossy layer on top, so the cake looks bakery-level with almost no effort.
What Makes This Cake So Good
The batter is forgiving. Melted butter and sour cream keep it soft for days, and a splash of hot coffee deepens the chocolate flavor without tasting like coffee at all. You don’t need a mixer, so the whole thing comes together fast.
I keep coming back to this recipe because the raspberries sink just enough to create tart little pockets against the dark chocolate. It’s a cake sturdy enough to slice for a lunchbox but pretty enough to put on a birthday table, and it rarely stays around long.
Ingredients
- 1½ cups all-purpose flour: unbleached works best.
- ¾ cup Dutch-process cocoa powder: use a good dark one for intensity.
- 1 cup granulated sugar: plain white sugar gives the cleanest sweetness.
- 1 tsp baking powder
- ½ tsp baking soda
- ½ tsp fine sea salt
- 2 large eggs, at room temperature: cold eggs can make the batter seize.
- ½ cup unsalted butter, melted and slightly cooled
- ½ cup full-fat sour cream: keeps the crumb tender.
- 1 tsp vanilla extract
- ½ cup hot strong coffee: instant or brewed, or use hot water in a pinch.
- 1 cup fresh raspberries: plus a few extra for topping; frozen work too (see notes).
- For the glaze
- 3 oz dark chocolate (60-70%), chopped
- ¼ cup heavy cream
Variations / Substitutions
- Use frozen raspberries: do not thaw them; add straight from the freezer and expect a little more streaking in the batter.
- Make it gluten-free: swap the all-purpose flour for a 1:1 gluten-free blend that contains xanthan gum.
- Skip the coffee: hot water works, but the cake will taste slightly less intense.
- Swap the glaze for powdered sugar: dust generously after the cake is completely cool.
- Try a different berry: blackberries or halved cherries work well in place of raspberries.
If you love this, you might also want to try my Flourless Chocolate Torte with raspberry compote.
How to Make One-Bowl Dark Chocolate Raspberry Cake
Step 1: Whisk the Dry Ingredients
Preheat the oven to 350°F (175°C). Line a 9-inch round cake pan with parchment paper and lightly grease the sides. In a large bowl, whisk together the 1½ cups flour, ¾ cup cocoa powder, 1 cup sugar, 1 teaspoon baking powder, ½ teaspoon baking soda, and ½ teaspoon salt until no lumps of cocoa remain. You can sift if your cocoa is clumpy, but a good whisk usually does the job.
The mixture will look uniformly dark and powdery. Take a second to check the bowl for any streaks of flour hiding at the bottom.
Step 2: Whisk in the Wet Ingredients
Make a well in the center of the dry ingredients and crack in the 2 eggs. Pour in the ½ cup melted butter, ½ cup sour cream, 1 teaspoon vanilla, and the ½ cup hot coffee. Whisk gently from the center outward, gradually pulling the dry ingredients into the wet, until just smooth. Stop as soon as you no longer see dry streaks. Overmixing can make the cake tough.
The batter will be glossy and thick, with a rich chocolatey smell. If it seems very stiff, that’s fine—it loosens a bit once the berries go in.
Step 3: Fold in the Raspberries
Scatter the 1 cup of raspberries over the batter. Use a flexible spatula to fold them in with only 3 or 4 strokes. You want streaks and pockets, not a uniform pink batter. The berries will bleed a little, which creates color variations in the baked cake—that’s part of its charm.
Step 4: Bake the Cake
Scrape the batter into the prepared pan and smooth the top. Bake for 30 to 35 minutes, until the center springs back lightly when pressed and a toothpick inserted in the middle comes out with a few moist crumbs (but no wet batter). The edges will pull away from the sides of the pan slightly. Let the cake cool in the pan on a wire rack for 10 minutes, then lift it out by the parchment and cool completely on the rack before glazing.
If you peek through the oven door near the end, you’ll see the raspberries bubbling at the edges and the top set with a slight crackle.
Step 5: Pour On the Glaze
While the cake cools, make the glaze. Place the 3 oz chopped dark chocolate in a small heatproof bowl. Heat the ¼ cup cream in a small saucepan or microwave just until it begins to simmer. Pour the hot cream over the chocolate and let it sit for 2 minutes, then stir until smooth. Once the cake is completely cool, pour the glaze over the center and let it run toward the edges. Give the pan a gentle tilt to nudge it if needed, then top with a handful of fresh raspberries while the glaze is still wet so they stick. Slice and serve once the glaze sets, about 15 minutes.
Tips for the Best Cake
- Bring eggs to room temperature quickly by placing them in a bowl of warm water for 5 minutes.
- Do not overmix after adding the flour; stop as soon as the batter comes together.
- Lining the pan with parchment paper makes lifting out a breeze and avoids stuck edges.
- If you forget to pull the butter out early, melt it slowly and let it cool a few minutes before mixing.
Bake times depending on your pan:
| Pan | Bake time |
|---|---|
| 9-inch round | 30–35 mins |
| 8-inch square | 35–40 mins |
| 9×5 inch loaf | 45–50 mins |
Keeping Leftover Cake Fresh
- Refrigerate: Store covered at room temperature for up to 2 days, or in the fridge for 4 days. The glaze will firm up in the fridge.
- Freeze: Wrap unglazed cake tightly and freeze for up to 2 months. Thaw and glaze fresh.
- Serve cold: Let it come to room temperature for 20 minutes before eating for the softest crumb.
What to Serve With Dark Chocolate Raspberry Cake
A dollop of lightly sweetened whipped cream balances the cake’s deep chocolate. A scoop of vanilla ice cream melts into the warm crumb if you serve it slightly rewarmed. For something tart, try a spoonful of crème fraîche on the side, which cuts through the richness.
Frequently Asked Questions
Can I use frozen raspberries?
Yes. Keep them frozen and fold them in straight away. The batter may streak more but the texture stays soft.
Do I have to use coffee?
No. Hot water works, though the chocolate flavor will be a little less intense. It’s still a good cake.
Can I make this cake a day ahead?
Yes. It keeps well overnight at room temperature, and the glaze sets firmly. Glaze it the day you serve if you want it shiny.
What if I don’t have sour cream?
You can substitute full-fat plain yogurt. The cake will be slightly less rich but still tender.
Dark Chocolate Raspberry Cake Recipe
Ingredients
Method
- Preheat oven to 350°F (175°C). Line a 9-inch round pan with parchment. Whisk flour, cocoa, sugar, baking powder, baking soda, and salt in a large bowl.
- Make a well in the center. Add eggs, melted butter, sour cream, vanilla, and hot coffee. Whisk until just smooth.
- Scatter raspberries over the batter and fold in with 3-4 strokes.
- Scrape into the pan and bake 30-35 minutes until a toothpick comes out with moist crumbs. Cool in pan 10 minutes, then transfer to rack to cool completely.
- Heat cream until simmering, pour over chopped chocolate, let stand 2 minutes, then stir smooth. Pour over cooled cake, top with extra raspberries, and let set before slicing.
