This chocolate brownie traybake is a rich, indulgent bake with a soft, fudgy centre and a gently crisp top. It is simple enough for beginners, yet delivers deep chocolate flavour that feels special and satisfying. Made in a single tray, it is perfect for sharing, slicing, and storing. From start to finish, this recipe takes around one hour.
Ingredients
For the brownie base
- 200g dark chocolate, broken into pieces
- 175g unsalted butter, cubed
- 275g caster sugar
- 3 large eggs
- 1 tsp vanilla extract
- 75g plain flour
- 50g cocoa powder
- 1/2 tsp baking powder
- Pinch of salt
How to Make Mary Berry Chocolate Brownie 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 so the brownies lift out easily.
- Melt the chocolate: Place the chocolate and butter in a heatproof bowl over simmering water and stir until smooth and glossy.
- Mix the batter: Remove from the heat and stir in the sugar. Beat in the eggs one at a time, then add the vanilla extract.
- Fold gently: Sift the flour, cocoa powder, baking powder and salt into the bowl and fold in carefully until just combined.
- Bake: Pour into the prepared tin, level the top and bake for 25 to 30 minutes until the surface is set.
- Cool and slice: Leave to cool completely in the tin before cutting into neat squares.

Tips for Perfect Brownies
How do I keep brownies fudgy?
Remove them from the oven while the centre is still slightly soft. They will continue to set as they cool.
Why did my brownies turn cakey?
Overbaking or too much flour can cause a dry texture. Weigh ingredients carefully and avoid baking for too long.
Can I add extras?
Chopped nuts or chocolate chips can be folded in just before baking for added texture.
Serving Suggestions
- Serve warm with vanilla ice cream
- Dust lightly with icing sugar
- Enjoy with coffee or tea
Storage
Room temperature
Store in an airtight container for up to 3 days.
Refrigerator
Keep chilled for up to 5 days. Bring to room temperature before serving.
Freezing
Wrap individual squares tightly and freeze for up to 3 months. Defrost overnight.
Nutrition
- Calories: 320 kcal
- Carbohydrates: 38g
- Protein: 4g
- Fat: 18g
- Saturated fat: 11g
- Sodium: 95mg
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 brownies will be slightly denser.
Is this cake suitable for children?
Yes, it has a rich chocolate flavour without being overly bitter, making it suitable for all ages.
Mary Berry Chocolate Brownie Traybake Recipe
Course: DessertCuisine: BritishDifficulty: Easy16
squares20
minutes30
minutes50
minutes320
kcal50
minutesRich, fudgy chocolate brownie traybake with a soft centre and crisp top, perfect for slicing and sharing.
Ingredients
200g dark chocolate, broken into pieces
175g unsalted butter, cubed
275g caster sugar
3 large eggs
1 tsp vanilla extract
75g plain flour
50g cocoa powder
1/2 tsp baking powder
Pinch of salt
Butter and baking parchment for lining
Directions
- Preheat the oven to 180°C (160°C fan). Grease and line a 23 x 30cm traybake tin with baking parchment.
- Melt the chocolate and butter together gently over a pan of simmering water, stirring until smooth.
- Remove from the heat and stir in the caster sugar until fully combined.
- Beat in the eggs one at a time, followed by the vanilla extract.
- Sift in the flour, cocoa powder, baking powder and salt, then fold gently until just combined.
- Pour the mixture into the prepared tin and level the surface.
- Bake for 25 to 30 minutes until set on top but still slightly soft in the centre.
- Leave to cool completely in the tin before slicing into squares.
Notes
- Do not overbake if you want a fudgy texture.
- Use good-quality dark chocolate for best flavour.
- Brownies firm up as they cool.
