One-Bowl Strawberry Crumble Cake

This strawberry crumble cake comes together in one bowl with fresh berries and a buttery crumble on top. It tastes like a soft, fruit-filled coffee cake with a crisp, golden lid that makes it feel a little special.

The batter is stirred by hand while the oven heats up, so it fits easily into a busy evening. Fresh or frozen strawberries both work here, which means you can make it any time you get a craving.

What Makes This Cake So Good

I love a dessert that doesn’t ask for a mixer and still delivers a real contrast in textures. This one gives you a tender, vanilla-scented crumb with jammy pockets of strawberry and a crunchy topping that stays crisp after baking.

It also solves the problem of a punnet of berries that are a day past their snacking prime. The fruit softens in the oven and turns almost syrupy, which keeps the cake moist without making it soggy.

Ingredients

• 1 1/2 cups all-purpose flour: spoon and level for a tender crumb
• 3/4 cup granulated sugar
• 2 tsp baking powder
• 1/4 tsp salt
• 1/2 cup unsalted butter, melted: slightly cooled
• 1 large egg
• 1/2 cup whole milk: room temperature is ideal
• 1 tsp vanilla extract
• 1 1/2 cups chopped fresh strawberries: about 8 oz, cut into small pieces
• For the crumble:
• 1/2 cup all-purpose flour
• 1/4 cup packed light brown sugar
• 3 tbsp cold unsalted butter: cubed

Variations / Substitutions

• Swap the berries: raspberries, blueberries, or chopped peaches all work with the same quantity. Frozen berries don’t need to be thawed first, just toss them in straight from the freezer.
• Gluten-free: use a 1:1 gluten-free flour blend in both the cake and crumble.
• Dairy-free: replace the butter with a plant-based stick and use oat milk.
• Extra spice: add 1/2 tsp cinnamon or a pinch of cardamom to the crumble mixture.

If you want something simpler with peak-summer strawberries, a basic Strawberry Galette lets the fruit shine on its own.

How to Make Strawberry Crumble Cake

Step 1: Mix the Cake Batter

Preheat the oven to 350°F (175°C) and grease an 8-inch square baking pan. Whisk the 1 1/2 cups flour, 3/4 cup sugar, 2 tsp baking powder, and 1/4 tsp salt together in a large bowl. In a separate small bowl, combine the melted butter, egg, 1/2 cup milk, and vanilla. Pour the wet ingredients into the dry and stir with a spatula just until no floury streaks remain.

The batter will be thick and smooth. Fold in the chopped strawberries gently so they stay mostly whole. A few streaks of flour are better than overmixing, which can make the cake tough.

Step 2: Make the Crumble Topping

Stir the 1/2 cup flour and brown sugar together in a small bowl. Add the cold cubed butter and use your fingertips or a pastry cutter to work it in until the mixture looks like coarse crumbs with some pea-sized bits of butter still visible.

The butter should stay cold so the crumble bakes up crisp. Pop the bowl in the fridge while the oven finishes preheating if your kitchen is warm.

Step 3: Bake the Cake

Scrape the batter into the prepared pan and spread it evenly with the spatula. Sprinkle the crumble over the top in an even layer, covering the batter completely. Bake on the center rack for 45 to 50 minutes, until the top is deep golden and a toothpick inserted near the center comes out with a few moist crumbs attached.

The whole kitchen will smell buttery and sweet. If the crumble starts to darken too fast, tent the pan loosely with foil after 30 minutes, but usually it browns at just the right pace.

Step 4: Slice and Serve the Cake

Let the cake cool in the pan on a wire rack for at least 15 minutes before you try to slice it. The crumble sets up as it cools and the slices will hold their shape. Run a knife around the edges and lift the cake out onto a board.

Serve it warm or at room temperature. A light dusting of powdered sugar right before serving makes the golden crumble look even prettier.

A Few Tips for the Best Crumble Cake

• Chill the crumble while the oven finishes heating: for an extra crunchy top. Those cold butter bits create steam and separate layers as they melt.
• Bring the milk and egg to room temperature: so the batter blends smoothly without overworking the flour.
• Macerate the strawberries for deeper flavor: toss the chopped berries with 1 tbsp of sugar and let them sit for 10 minutes, then drain any liquid before folding them into the batter.
• Cool the cake completely if you want neat squares; the crumble will cut cleanly and not crumble apart.

Bake times will shift a little depending on your pan size.

Storing Leftover Cake

• Refrigerate: Cover the cooled cake tightly and store in the fridge for up to 3 days. The crumble will soften a bit, but it’s still delicious.
• Serve cold or let it come to room temperature: on the counter for 20 minutes before eating. A quick 10-second zap in the microwave revives the softness without making it mushy.

Frequently Asked Questions

Why did my crumble topping sink into the cake?

The batter likely had extra moisture or the strawberries released a lot of juice. Next time, toss the berries in a spoonful of flour before folding them in and make sure the crumble is cold when it goes on top.

Can I leave the cake out on the counter?

It’s fine to leave it covered at room temperature for a day, but after that the fruit stays fresher in the fridge.

Can I make this cake ahead of time?

Yes, bake it the day before and keep it covered. The crumble will lose a little of its crunch overnight, but the flavor is just as good, and you can rewarm individual slices quickly.

Do I need to adjust the baking time for frozen strawberries?

Add 5 to 8 minutes if using unthawed frozen berries. The batter will be colder and the extra moisture needs a touch longer to bake through.

Strawberry Crumble Cake Recipe

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 50 minutes mins

Total Time 1 hour hr 5 minutes mins

Servings: 8 servings

Calories: 320

Ingredients Method Notes

Ingredients

  

• 1 1/2 cups all-purpose flour
• 3/4 cup granulated sugar
• 2 tsp baking powder
• 1/4 tsp salt
• 1/2 cup unsalted butter, melted
• 1 large egg
• 1/2 cup whole milk
• 1 tsp vanilla extract
• 1 1/2 cups chopped fresh strawberries
• For the crumble:
• 1/2 cup all-purpose flour
• 1/4 cup packed light brown sugar
• 3 tbsp cold unsalted butter, cubed

Method

 

1. Preheat oven to 350°F (175°C). Grease an 8-inch square baking pan.
2. Whisk flour, sugar, baking powder, and salt in a large bowl. Mix melted butter, egg, milk, and vanilla separately, then stir into dry ingredients until just combined. Fold in strawberries.
3. For the crumble, stir flour and brown sugar together, then cut in cold butter until coarse crumbs form.
4. Spread batter in pan, sprinkle crumble on top. Bake 45-50 minutes until golden and a toothpick comes out with moist crumbs.
5. Cool in pan on a rack for 15 minutes, then slice and serve.

Notes

The cake slices most cleanly after cooling completely, but it tastes wonderful still warm from the pan. If using frozen strawberries, no need to thaw, just expect to add 5-8 minutes to the bake time.