This blueberry traybake is a wonderfully simple cake with a soft, buttery sponge and bursts of juicy fruit in every bite. It is lightly sweet, delicately flavoured with vanilla, and bakes into a golden, tender crumb that slices beautifully. Ideal for beginners, this is a relaxed, all-in-one recipe that needs very little effort. From start to finish, it takes just over an hour, making it perfect for an easy afternoon bake.
Ingredients
For the sponge
- 225g unsalted butter, softened
- 225g caster sugar
- 4 large eggs
- 225g self-raising flour
- 1 tsp baking powder
- 2 tbsp milk
- 1 tsp vanilla extract
For the topping
- 200g blueberries
- 1 tbsp plain flour
- 1 tbsp caster sugar
How to Make Mary Berry Blueberry Traybake
- Prepare the oven: Preheat the oven to 180°C or 160°C fan. Grease and line a 23 x 30cm traybake tin with baking parchment, making sure the paper comes up the sides for easy removal.
- Mix the sponge: Place the butter, caster sugar, eggs, self-raising flour, baking powder, milk, and vanilla extract into a large bowl. Beat together with an electric mixer until smooth, pale, and well combined.
- Fill the tin: Spoon the mixture into the prepared tin and level the surface gently with a palette knife.
- Add the blueberries: Toss the blueberries with the flour and caster sugar, then scatter evenly over the surface of the cake mixture.
- Bake: Bake in the centre of the oven for 35 to 40 minutes, until golden, risen, and a skewer inserted into the centre comes out clean.
- Cool: Leave the traybake to cool in the tin for 10 minutes, then lift out using the parchment and transfer to a wire rack to cool completely.

Tips
How do I stop the blueberries sinking?
Lightly coating the blueberries in flour helps them stay suspended in the sponge as it bakes.
Can I use frozen blueberries?
Yes, but do not defrost them first. Add them straight from frozen and expect a slightly longer baking time.
How do I know when the traybake is done?
The sponge should feel springy to the touch and a skewer inserted into the centre should come out clean.
Serving Suggestions
- Serve simply with a dusting of icing sugar.
- Enjoy with a spoonful of lightly whipped cream.
- Pair with a cup of tea for an easy afternoon treat.
Storage
Room temperature
Store in an airtight container for up to 3 days.
Refrigerator
Keeps well for up to 5 days, though the sponge is best enjoyed at room temperature.
Freezing
Freeze individual slices wrapped well for up to 3 months. Defrost fully before serving.
Nutrition
- Calories: 380 kcal
- Carbohydrates: 45g
- Protein: 6g
- Fat: 19g
- Saturated fat: 11g
- Sodium: 220mg
Nutrition values are estimates and may vary.
FAQs
Can I bake this as a loaf instead?
Yes, divide the mixture between two loaf tins and increase the baking time slightly. Check for doneness with a skewer.
What size tray bake tin works best?
A tin around 23 x 30cm gives the ideal depth and even baking.
Can I use wholemeal flour?
You can replace half the flour with wholemeal, but the cake will be slightly denser.
Is this cake suitable for children?
Yes, it is mildly sweet and soft, making it ideal for all ages.
Mary Berry Blueberry Traybake Recipe
Course: DessertCuisine: BritishDifficulty: Easy4
servings30
minutes40
minutes300
kcal1
hour10
minutesSoft and buttery blueberry traybake with a light vanilla sponge and juicy berries. An easy Mary Berry-style bake perfect for sharing.
Ingredients
225g unsalted butter, softened
225g caster sugar
4 large eggs
225g self-raising flour
1 tsp baking powder
2 tbsp milk
1 tsp vanilla extract
200g blueberries
1 tbsp plain flour
1 tbsp caster sugar
Directions
- Preheat the oven to 180°C (160°C fan) and line a traybake tin.
- Beat all sponge ingredients together until smooth.
- Spread into the tin and level the surface.
- Scatter blueberries over the top.
- Bake for 35–40 minutes until golden and cooked through.
- Cool before slicing and serving.
Notes
- Do not overmix once smooth.
- Best enjoyed within 3 days.
