Indulge your sweet tooth with this Raspberry Marshmallow Slice, a no-bake treat that combines a crunchy biscuit base, fruity raspberry jam, and fluffy marshmallow topping. Perfect for parties, afternoon tea, or a fun dessert, this slice is easy to make and requires no oven.
Why You’ll Love This Recipe
- No-bake and quick to prepare
- Sweet, fruity, and perfectly balanced
- Fun for kids and adults alike
- Can be made ahead and stored
- Great for parties, picnics, or afternoon tea
Ingredients

- 200g plain biscuits (digestive or tea biscuits), crushed
- 100g unsalted butter, melted
- 1 cup raspberry jam
- 250g marshmallows
- 1/4 cup water
- 200g white chocolate, melted (optional, for drizzling)
Step-by-Step Instructions

- Line a square baking pan with parchment paper.
- Mix crushed biscuits with melted butter and press into the base of the pan evenly.
- Spread raspberry jam evenly over the biscuit base.
- In a saucepan, heat marshmallows with water over low heat, stirring until melted and smooth.
- Pour the marshmallow mixture over the jam layer and smooth the top with a spatula.
- Chill in the fridge for at least 2 hours until set.
- Optional: drizzle melted white chocolate over the top before slicing.
- Cut into squares or rectangles and serve.
Tips & Variations
- Use fresh raspberries blended into the jam for a natural flavor.
- Add crushed nuts on top for a crunchy texture.
- Swap marshmallows for vegan marshmallows to make it plant-based.
- Decorate with extra chocolate shavings or freeze-dried raspberries for a festive touch.
Storage & Freezer Instructions
- Refrigeration: Store slices in an airtight container for up to 4 days.
- Freezing: Freeze slices individually wrapped in parchment paper for up to 1 month.
- Thawing: Thaw in the fridge before serving for best texture.
Serving & Pairing Ideas

- Serve chilled as a dessert or afternoon treat.
- Pair with fresh berries or whipped cream.
- Cut into bite-sized pieces for parties or lunchboxes.
Frequently Asked Questions
Can I make this slice without white chocolate?
Yes, the white chocolate is optional and just adds a decorative touch. The slice is delicious on its own.
How do I prevent the marshmallow from sticking?
Line the pan with parchment paper and let the slice chill completely before slicing.
Can I use other jam flavors?
Absolutely! Strawberry, raspberry & blackberry, or apricot jams work beautifully.
Can I make this vegan?
Yes, use plant-based butter, vegan marshmallows, and ensure the biscuits are vegan-friendly.
Ready to Make It?
This Raspberry Marshmallow Slice is sweet, fruity, and fun to make. No-bake and easy to assemble, it’s perfect for any occasion. Save this recipe for a simple, show-stopping dessert.
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Sweet Raspberry Marshmallow Slice
- Total Time: 2 hours 15 minutes
- Yield: 16 squares 1x
- Diet: Vegetarian
Description
Crispy biscuit base, fruity raspberry jam, and fluffy marshmallow topping make this Raspberry Marshmallow Slice a no-bake, sweet, and crowd-pleasing treat.
Ingredients
200g plain biscuits (digestive or tea biscuits), crushed
100g unsalted butter, melted
1 cup raspberry jam
250g marshmallows
1/4 cup water
200g white chocolate, melted (optional)
Instructions
1. Line a square baking pan with parchment paper.
2. Mix crushed biscuits with melted butter and press into the base.
3. Spread raspberry jam evenly over the biscuit base.
4. In a saucepan, heat marshmallows with water over low heat, stirring until melted and smooth.
5. Pour the marshmallow mixture over the jam layer and smooth the top.
6. Chill in the fridge for at least 2 hours until set.
7. Optional: drizzle melted white chocolate over the top before slicing.
8. Cut into squares or rectangles and serve.
Notes
Use fresh raspberries blended into the jam for natural flavor.
Add crushed nuts on top for extra crunch.
Swap marshmallows for vegan marshmallows to make it plant-based.
Decorate with chocolate shavings or freeze-dried raspberries for a festive touch.
- Prep Time: 15 minutes
- Cook Time: 0 minutes
- Category: Dessert
- Method: No-Bake
- Cuisine: Dessert
Nutrition
- Serving Size: 1 square
- Calories: 200
- Sugar: 18
- Sodium: 50
- Fat: 10
- Saturated Fat: 6
- Unsaturated Fat: 3
- Trans Fat: 0
- Carbohydrates: 25
- Fiber: 1
- Protein: 3
- Cholesterol: 15