Mary Berry Rocky Road Recipe

Name: Mary Berry Rocky Road Recipe
Prep time: 15 min
Cook time: 5 min
Total time: 20 min
Ingredients: 300g dark chocolate (60–70%), roughly chopped; 125g unsalted butter, cubed; 3 tbsp golden syrup; 200g digestive biscuits; 100g mini marshmallows; 75g raisins or sultanas; 75g toasted hazelnuts or almonds, roughly chopped; Pinch of fine salt (optional, but recommended); 1–2 tbsp icing sugar, to dust (optional)

This Mary Berry rocky road recipe is a classic British no-bake traybake made with rich melted chocolate, buttery biscuits, and soft marshmallows, all set into thick, sliceable squares. The texture is exactly what you want from rocky road: fudgy, crunchy, and just a little chewy, with a deep chocolate flavour balanced by sweet mix-ins. It’s wonderfully easy, beginner-friendly, and ideal for making ahead for parties or gifting. Total time is about 15 minutes hands-on, plus 2 hours chilling.

Ingredients

For the chocolate base

300g dark chocolate (60 to 70%), roughly chopped
125g unsalted butter, cubed
3 tbsp golden syrup
Pinch of fine salt (optional, but recommended)

For the rocky road mix-ins

200g digestive biscuits
100g mini marshmallows
75g raisins or sultanas
75g hazelnuts or almonds, lightly toasted and roughly chopped

To finish (optional)

1 to 2 tbsp icing sugar, for dusting

How to Make Mary Berry Rocky Road Recipe

Prepare the tin: Line a 20cm square tin with baking parchment, leaving a little overhang so you can lift the rocky road out easily later.
Crush the biscuits: Break the digestives into a mix of small chunks and crumbs. You want texture, so avoid crushing them too finely.
Melt the chocolate base: Put the chocolate, butter, and golden syrup into a heatproof bowl. Set it over a pan of barely simmering water (make sure the bowl doesn’t touch the water) and stir until smooth and glossy. Alternatively, microwave in 20 to 30 second bursts, stirring between each.
Cool slightly: Take the bowl off the heat and let the chocolate mixture sit for about 2 minutes. This small pause helps stop the marshmallows from melting into the chocolate.
Mix everything together: Stir in the salt (if using), then fold in the crushed biscuits, marshmallows, raisins, and nuts. Mix until everything is evenly coated and there are no dry pockets.
Press into the tin: Tip the mixture into the lined tin and press down firmly with the back of a spoon. Aim for an even thickness, especially in the corners, so it slices neatly.
Chill until set: Refrigerate for at least 2 hours, or until completely firm. If your kitchen is warm, give it a little longer.
Slice and finish: Lift out using the parchment overhang. Dust with icing sugar if you like, then slice into squares. For clean cuts, warm a knife under hot water, wipe dry, and slice, wiping the blade between cuts.

Tips

How do I stop the marshmallows from melting?

Let the melted chocolate mixture cool for a couple of minutes before adding them. Using mini marshmallows also helps, and folding them in gently rather than stirring aggressively keeps them intact.

Why is my rocky road greasy or oily?

This usually happens if the chocolate mixture gets too hot. Melt it gently over low heat and stir just until smooth. If microwaving, use short bursts and stop as soon as it melts.

How do I get neat, sharp slices?

Chill until fully set, then use a warm, dry knife. Run the blade under hot water, wipe it dry, slice, and wipe between cuts.

What biscuits work best for a Mary Berry-style rocky road?

Digestive biscuits are ideal for a classic British flavour and the right crunch. You can swap in Rich Tea for a lighter bite, or a mix of digestives and shortbread for extra buttery crumbs.

Serving Suggestions

Serve with a mug of tea or strong coffee.
Add to a party platter with brownies, flapjacks, and mini cupcakes.
Pack into lunchboxes as an occasional treat.
Gift in parchment-lined boxes tied with ribbon for holidays.

Storage

Room temperature

Rocky road can sit at cool room temperature for up to 3 days in an airtight container. If your kitchen is warm, it will soften, so the fridge is usually best.

Refrigerator

Store in an airtight container for up to 10 days. Let squares sit out for 5 to 10 minutes before eating if you prefer a softer bite.

Freezing

Freeze in a single layer until firm, then stack with parchment between layers in a freezer-safe container. Freeze for up to 3 months. Thaw overnight in the fridge or for 30 to 60 minutes at room temperature.

Nutrition

Calories: 260 kcal
Carbohydrates: 26 g
Protein: 3 g
Fat: 16 g
Saturated fat: 9 g
Sodium: 65 mg

Nutrition values are estimates and will vary depending on the chocolate, biscuits, and mix-ins you use.

FAQs

Can I use milk chocolate instead of dark chocolate?

Yes. Milk chocolate makes a sweeter, softer rocky road. If you swap it in, consider adding a pinch of salt and reducing the golden syrup to 2 tablespoons to keep it from becoming overly sweet.

What size tin is best for rocky road?

A 20cm (8-inch) square tin gives thick, neat squares. If you use a larger tin, the rocky road will be thinner and will set faster.

Can I make this Mary Berry rocky road recipe without nuts?

Absolutely. Replace the nuts with extra biscuits, dried fruit, or toasted seeds. You can also add crushed pretzels for crunch without using nuts.

How long does rocky road take to set in the fridge?

Allow at least 2 hours, and 3 hours if your mixture was warm or your fridge runs slightly high. It should feel firm all the way through before slicing.

Why did my chocolate seize when melting?

Chocolate usually seizes if it overheats or comes into contact with water. Melt it gently over low heat and keep the bowl completely dry. If it thickens, you can sometimes rescue it by stirring in 1 teaspoon of neutral oil, but it’s best to prevent seizing in the first place.