Soft & Tender Vanilla Blueberry Cake

This vanilla blueberry cake is the kind of simple, buttery sheet cake that works for breakfast, an afternoon snack, or a last-minute dessert. It’s soft and tender with a fine crumb and juicy blueberries in every bite.

It comes together in one bowl with basic pantry staples, so you can have it in the oven in under 15 minutes. No fussy layers or frosting required; just a dusting of powdered sugar if you like.

Why This Blueberry Cake Stays in the Rotation

I’ve made a lot of blueberry cakes over the years, and this one is the version I keep coming back to. The crumb is fine and tender, not at all dense, and the vanilla is subtle enough to let the berries shine.

The batter uses melted butter, so there’s no waiting for butter to soften, and it bakes up in a square pan, giving you clean slices that are easy to share (or not).

Ingredients

• 1 1/2 cups all-purpose flour: you’ll reserve 1 tablespoon from this for coating the blueberries
• 3/4 cup granulated sugar
• 2 teaspoons baking powder
• 1/4 teaspoon salt
• 1/2 cup buttermilk: whole milk with a teaspoon of lemon juice or white vinegar works in a pinch
• 1/4 cup unsalted butter, melted and slightly cooled
• 1 large egg, at room temperature
• 2 teaspoons pure vanilla extract
• 1 1/2 cups fresh blueberries: if using frozen, do not thaw them — toss them in a little extra flour

Variations / Substitutions

• Dairy-free: Use oat milk mixed with 1 teaspoon lemon juice for the buttermilk and melted coconut oil in place of butter.
• Lemon twist: Add 1 teaspoon finely grated lemon zest to the dry ingredients.
• Other berries: Raspberries or chopped strawberries work well; toss them in flour the same way.
• Gluten-free: A 1-to-1 gluten-free flour blend works beautifully here.

If you like this, our Simple Banana Bread is another one-bowl favorite.

How to Make Vanilla Blueberry Cake

Step 1: Whisk the Dry Ingredients

Preheat your oven to 350°F (175°C) and grease an 8×8-inch baking pan with butter or line it with parchment paper. In a large bowl, whisk together the 1 1/2 cups flour, sugar, baking powder, and salt. Remove 1 tablespoon of the flour mixture and place it in a small bowl; you will use it to coat the blueberries.

Step 2: Stir the Batter Together

Make a well in the center of the dry ingredients. Pour in the buttermilk, melted butter, egg, and vanilla extract. Stir with a flexible spatula just until combined and no large streaks of flour remain. In the small bowl with the reserved flour mixture, toss the blueberries until they’re lightly coated, then gently fold them into the batter.

The batter should look thick and pale, with berries suspended throughout. Work carefully when folding them in so you don’t crush them and streak the batter with blue juice.

Step 3: Bake the Cake

Scrape the batter into the prepared pan and spread it into an even layer with your spatula. If you like, sprinkle a teaspoon of granulated sugar over the top for a delicate crunch. Bake for 30 to 35 minutes, until the top is golden and a toothpick inserted in the center comes out clean or with a few moist crumbs.

The edges will be lightly browned and pulling away from the pan just slightly. The cake fills your kitchen with a warm vanilla scent as it bakes, so you’ll know it’s nearly ready before the timer goes off.

Step 4: Slice and Serve the Cake

Let the cake cool in the pan on a wire rack for 10 minutes, then run a knife around the edge and lift it out by the parchment paper if you used it. Transfer to the rack to cool completely, or slice it right from the pan while it’s still a little warm.

Serve it plain, with a quick dusting of powdered sugar, or alongside a spoonful of lightly sweetened whipped cream. A warm slice with a glass of cold milk is hard to beat.

Tips for the Softest Blueberry Cake

• Bring your egg and buttermilk to room temperature before you start. Cold ingredients can make the batter seize up and bake up dense.
• If your blueberries are especially large, slice a few in half so they spread more evenly through the cake.
• Don’t overmix once the flour is added; stir until the dry spots just disappear, then stop.
• For a golden, crackly top, sprinkle a little coarse sugar (like turbinado) over the batter before baking.
• Let the cake cool for at least 20 minutes before slicing if you want the cleanest squares; warm cake is more crumbly.

Bake times adjust depending on the pan you use.

Storing Leftover Blueberry Cake

• Refrigerate: Keep the cake tightly covered at room temperature for up to 2 days, or refrigerate for up to 5 days. The texture is best at room temperature, so let chilled slices sit out for about 20 minutes before eating.
• Freeze: Wrap the whole cooled cake or individual slices in plastic wrap, then foil, and freeze for up to 3 months. Thaw overnight in the fridge.
• Reheating: A 10-second zap in the microwave brings back that just-baked warmth.

What to Serve with Vanilla Blueberry Cake

This cake stands on its own, but a few extras make it feel special. A dollop of lightly sweetened whipped cream or crème fraîche adds a cool, tangy contrast to the sweet vanilla crumb. Fresh berries on the side help if you’re serving it for brunch. And a scoop of good vanilla ice cream, the kind with flecks of real vanilla, turns a slice into a real dessert.

Frequently Asked Questions

Can I double this recipe for a larger crowd?

Yes, simply double all ingredients and bake in a 9×13-inch pan for 35 to 40 minutes.

Can I substitute whole wheat flour?

You can replace up to half of the all-purpose flour with whole wheat flour, but the cake will be a bit denser. I don’t recommend using 100% whole wheat; the texture becomes too heavy.

Can I add a crumb topping?

Definitely. Combine 1/4 cup flour, 1/4 cup packed brown sugar, 2 tablespoons melted butter, and a pinch of cinnamon. Sprinkle it over the batter just before baking.

Vanilla Blueberry Cake Recipe

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 35 minutes mins

Total Time 50 minutes mins

Servings: 9 servings

Calories: 220

Ingredients Method Notes

Ingredients

  

• 1 1/2 cups all-purpose flour
• 3/4 cup granulated sugar
• 2 teaspoons baking powder
• 1/4 teaspoon salt
• 1/2 cup buttermilk
• 1/4 cup unsalted butter, melted
• 1 large egg
• 2 teaspoons vanilla extract
• 1 1/2 cups fresh blueberries

Method

 

1. Preheat oven to 350°F (175°C). Grease an 8×8-inch pan. In a large bowl, whisk flour, sugar, baking powder, and salt. Remove 1 tablespoon of flour mixture and set aside.
2. Make a well in the dry ingredients. Add buttermilk, melted butter, egg, and vanilla. Stir until just combined. Toss blueberries with the reserved flour, then gently fold into the batter.
3. Scrape batter into the prepared pan and spread evenly. Bake 30 to 35 minutes, until golden and a toothpick inserted in the center comes out clean.
4. Cool in the pan for 10 minutes, then remove and slice. Serve warm or at room temperature.

Notes

If you use frozen blueberries, do not thaw them; toss them with an extra tablespoon of flour to prevent excess moisture. The cake keeps well, but the texture is best the day it’s made. For a bright lemon note, add 1 teaspoon lemon zest to the dry ingredients.