Name: No-Mixer Blueberry Chocolate Cake Recipe
Prep time: 15 min
Cook time: 50 min
Total time: 65 min
Ingredients: 1½ cups all-purpose flour; ¾ cup unsweetened cocoa powder; 1 tsp baking soda; ½ tsp baking powder; ½ tsp fine sea salt; ¾ cup granulated sugar; ½ cup packed light brown sugar; ½ cup unsalted butter, melted and cooled; 2 large eggs, at room temperature; 1 cup buttermilk, at room temperature; 2 tsp vanilla extract; 1 cup fresh blueberries; ⅔ cup heavy cream; 4 oz semi-sweet chocolate, finely chopped

This blueberry chocolate cake is my go-to when I want a dessert that looks like I spent the afternoon on it but secretly came together in one bowl and a whisk. The batter is dark and glossy, and fresh blueberries disappear into it like little jammy pockets that burst as the cake bakes.

A simple chocolate ganache draped over the top turns it into something you could serve for a birthday or a Tuesday. No stand mixer, no creaming butter, just a sturdy wooden spoon and a promise of fudgy chocolate with every bite.

Why This One Stays in the Rotation

The crumb is tight and tender, close to a brownie without being too heavy. Cocoa powder gives it a deep chocolate flavor that doesn’t get buried by the fruit, and the blueberries keep the whole thing from feeling dry the next day.

It’s also the most forgiving chocolate cake I know. You can swap in frozen berries, use whatever pan you have on hand, and it still comes out with a shiny crackle on top and a moist interior that slices cleanly.

Ingredients

1½ cups all-purpose flour: spooned and leveled, not scooped, for a tender cake
¾ cup unsweetened cocoa powder: Dutch-process gives the richest flavor, but natural works too
1 tsp baking soda
½ tsp baking powder
½ tsp fine sea salt
¾ cup granulated sugar
½ cup packed light brown sugar
½ cup unsalted butter, melted and cooled slightly: you can use salted butter and reduce the added salt to ¼ tsp
2 large eggs, at room temperature
1 cup buttermilk, at room temperature: see Variations for a quick sub
2 tsp vanilla extract
1 cup fresh blueberries: rinsed and patted dry; frozen works too, do not thaw
For the ganache:
⅔ cup heavy cream
4 oz semi-sweet chocolate, finely chopped: about ⅔ cup chips if using chips

Variations / Substitutions

Swap the fruit: raspberries or halved blackberries work beautifully here. Avoid strawberries — they release too much liquid.
No buttermilk?: Add 1 tbsp white vinegar or lemon juice to 1 cup whole milk, stir, and let it sit for 5 minutes.
Use a different fat: Melted coconut oil can replace the butter for a dairy-free cake; the texture will be slightly softer.
Change the ganache: white chocolate ganache makes a striking contrast against the dark cake, or skip the ganache altogether and dust with powdered sugar.
Make it in a loaf pan: The batter also bakes well as a loaf; see the timing table below.

If you love dark chocolate and berries together, you might like my Blackberry Brownies recipe — same idea, even fudgier.

How to Make No-Mixer Blueberry Chocolate Cake

Step 1: Whisk the Dry Ingredients

Preheat your oven to 350°F (175°C) and line the bottom of a 9-inch round cake pan with parchment paper, then grease the sides. In a large mixing bowl, whisk together the 1½ cups flour, ¾ cup cocoa powder, 1 tsp baking soda, ½ tsp baking powder, and ½ tsp salt until everything is evenly distributed and no lumps of cocoa remain.

The mixture will look like dark, fine sand. If you see little white specks of baking soda or powder, keep whisking — they need to dissolve into the batter later to avoid a metallic taste.

Step 2: Mix the Wet Ingredients

Pour the melted ½ cup butter into the dry ingredients, then add the ¾ cup granulated sugar, ½ cup brown sugar, 2 eggs, 1 cup buttermilk, and 2 tsp vanilla. Use a wooden spoon or a sturdy spatula to stir everything together until you have a thick, shiny batter with no dry streaks. It should look almost like wet fudge.

Don’t overwork it. As soon as the flour disappears, stop stirring. Overmixing will make the cake tough, especially with a no-mixer batter like this one.

Step 3: Fold in the Blueberries

Scatter the 1 cup blueberries over the batter and gently fold them in with a few broad strokes, just until they are evenly distributed. You want to keep the berries whole, so use a light hand and stop as soon as you don’t see clumps of fruit sitting on top.

The batter will be thick enough to hold the blueberries in place, so they won’t all sink to the bottom like they sometimes do in thinner batters. A few near the bottom edge will bake into jammy little pockets, which is exactly what you want.

Step 4: Bake the Cake

Scrape the batter into the prepared pan and smooth the top with the back of your spoon. Bake for 45 to 50 minutes, until a toothpick inserted in the center comes out with a few moist crumbs clinging to it but no wet batter. If you hit a blueberry, test a different spot.

Check at 40 minutes just to be safe, especially if your oven runs hot. The top will spring back when pressed lightly and the edges will have pulled away from the sides of the pan by a millimeter or two. Let the cake cool in the pan for 10 minutes, then turn it out onto a rack to cool completely before glazing.

Step 5: Make the Chocolate Ganache

While the cake cools, chop 4 oz semi-sweet chocolate finely and place it in a heatproof bowl. Heat ⅔ cup heavy cream in a small saucepan over medium heat until you see tiny bubbles around the edge and wisps of steam rising — not a full boil. Pour the hot cream over the chocolate and let it sit for 2 minutes without stirring.

After those 2 minutes, whisk gently from the center outward until the ganache is smooth and glossy. It will be pourable but slightly thick, like warm honey. If it looks separated, add a teaspoon of warm cream and whisk again until it comes together.

Step 6: Glaze and Slice the Cake

Set the cooled cake on a serving plate or stand. Pour the ganache right into the center and tilt the plate to encourage it to flow toward the edges, letting some drip down the sides. Run a spatula over the top only if you need to nudge it. Let the ganache set for about 15 minutes before slicing. The surface will lose its wet shine and take on a soft sheen, and the berries will peek through in dark, jammy spots. Slice and serve while the cake is still slightly warm, or let it firm up completely for cleaner cuts.

A Few Notes Before You Start

Weigh your flour if you can: 1½ cups of spooned and leveled flour is about 190g. Scooping directly from the bag can add up to 30g extra flour, which makes the cake dry and crumbly.
Room temperature eggs and buttermilk matter: They help the butter incorporate without seizing, giving the batter a smoother texture. If you’re in a rush, submerge the eggs in warm water for 5 minutes and microwave the buttermilk for 15 seconds, no longer.
Frozen blueberries are fine: Do not thaw them. Toss them in a teaspoon of flour before folding in to prevent them from bleeding too much color into the batter. The cake may need 3 to 5 extra minutes in the oven.
Watch the ganache: If the cream boils, it can scorch the chocolate. You want it just hot enough to melt the chocolate completely when they meet after the 2-minute rest.

Bake times will shift a bit depending on the pan you use. Here are the adjustments I’ve found work reliably.

Pan Type	Baking Time	Notes
9-inch round	45–50 mins	Standard pan, as written
8-inch round	50–55 mins	Deeper batter, check at 45 mins
8×8-inch square	40–45 mins	Shallower cake, bakes faster
9×5-inch loaf	55–60 mins	Dome may crack, that’s fine

Keeping It Fresh

Refrigerate: The cake keeps well in a covered container at room temperature for up to 2 days, or in the fridge for 5 days. The ganache will firm up like a truffle when cold, which I actually love.
Reheating: A 10-second zap in the microwave brings back the fudgy texture and softens the ganache slightly. Just don’t overdo it or the chocolate can seize.
Freeze: Wrap the unglazed cake tightly in plastic and freeze for up to a month. Thaw on the counter, then add the ganache fresh.

What to Serve With No-Mixer Blueberry Chocolate Cake

A scoop of vanilla ice cream is the obvious move here, the cold creaminess against the dense, chocolatey slice. A dollop of barely sweetened whipped cream and a few fresh blueberries on the side keep the plate looking bright. For a more grown-up pairing, a small pour of cold heavy cream over the cake — no sugar, no vanilla — lets the chocolate and the fruit do the talking.

Frequently Asked Questions

Can I use oil instead of butter?

Yes, ½ cup of a neutral vegetable oil works well and makes the cake even moister. The crumb will be a bit softer and the chocolate flavor slightly less rich, but still very good.

Do I need to toss the blueberries in flour before adding them?

Not with fresh blueberries in this thick batter — they stay suspended without it. If using frozen, a light dusting of flour helps prevent them from settling in a clump.

Why did my cake sink in the middle?

It usually means the batter was overmixed after adding the wet ingredients, or the oven door was opened too early. Wait until at least the 35-minute mark before peeking.

Can I skip the ganache?

Of course. The cake is lovely on its own with a dusting of powdered sugar, or a simple glaze made from ½ cup confectioners’ sugar mixed with a tablespoon of milk and a splash of vanilla.