Mummy Mars Bar Slices
A spooky twist on the classic Mars Bar Slice, these Mummy Mars Bar Slices are a fun and easy no-bake Halloween treat. With a chewy rice crispy base and white chocolate “bandages”, they’re perfect for Halloween parties or baking with the kids.
Last Halloween, I shared a recipe for Monster Rice Krispies Squares, which I’ve been making since my kids were just wee. They’re the perfect easy Halloween treat, so this year I wanted to share another fun idea for Halloween baking that’s just as simple but with a spooky twist.
After a bit of brainstorming, I came up with these Mummy Mars Bar Slices.
Taking inspiration from my much-loved Mars Bar Slice recipe, I’ve used the same tried-and-tested base but given it a fun Halloween makeover. Think of them as a spooky take on a classic Scottish tray bake, perfect for Halloween parties, trick-or-treat nights, or just a wee bit of seasonal baking with the kids.
The base is everything you expect from a good Mars Bar Slice: chewy, crispy and packed with that unmistakable Mars Bar flavour. Simply melt the Mars Bars with butter, then stir through rice crispies to create that iconic sticky base.
Instead of the traditional chocolate topping, I switch things up with white chocolate drizzled across the top to resemble a mummy’s bandages. Add a few edible candy eyes, and suddenly your traybake has transformed into a tray of spooky little mummies.
They’re quick, easy, no-bake Halloween treats, and exactly the kind of fun recipe that’s perfect for getting kids involved in the kitchen.
Alive or not, these Mummy Mars Bar Slices are a Halloween sweet treat the whole family will love.
Top Tips for Mars Bar Slice Mummies:
• Won’t Melt Smooth: The nougat doesn’t melt the same way as the chocolate and caramel, so the mixture will always look a little lumpy. You can break it up slightly with the back of a spoon or spatula, but don’t worry, once the rice crispies are mixed in, everything will combine nicely.
• Use a Low Heat: Too much heat can cause the chocolate to seize or burn. Gentle heat and a bit of patience will give you the best texture for your Mars Bar Slice base.
• Mix Quick: The Mars Bar mixture starts to set as it cools, so it’s best to stir everything together straight away and press it into your tin while it’s still warm.
• Drizzle How You Like: A spoon works perfectly well for creating messy mummy “bandages”, but if you want a neater finish, you can spoon the melted chocolate into a piping bag and drizzle it across the slices.
• No Eyes? No problem: Chocolate chips work just as well for eyes.
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Mummy Mars Bar Slices
INGREDIENTS
- 115 g Butter or Block Margarine
- 230 g Mars Bars (Milky Ways in the USA) (roughly chopped)
- 130 g Rice Krispies
- 150 g White Chocolate
- 24 Edible Eyes
EQUIPMENT
- 20cm Square Tin (8-inch)
- Medium Pan
INSTRUCTIONS
- Line a 20cm (8-inch) square baking tin with some greaseproof paper and set aside.
- In a large bowl, melt the butter/margarine and Mars Bars over a bain-marie or in short bursts in the microwave.
- Add the rice krispies to the melted ingredients and mix well, ensuring all are coated.
- Tip the mixture into your prepared baking tray and push down with the back of a spoon, ensuring an even finish right into the corners. Leave to set in the fridge for at least 2 hours.
- Once set, cut your Mars Bar Slice into your desired size and place on a fresh piece of greaseproof paper, with a little space between each.
- Melt the white chocolate over a bain-marie, or in short bursts in the microwave. Allow the chocolate to cool slightly before drizzling it over your Mars Bar slices. Finish with a couple of edible eyes, stuck on with some excess chocolate.
- Allow the chocolate on your Mummy Mars Bar Slices to set for an hour or two, before enjoying.
IMPORTANT NOTE:
All my recipes are developed using a digital scale and the metric system (grams and millilitres). Cup measurements are available as a conversion but these, unfortunately, won’t always be as accurate. For best results, I always recommend baking with a digital scale.
NOTES:
Storage:
Store your Mummy Mars Bar Slices in an airtight container at room temperature for up to 4 days. If your kitchen is particularly warm, you may prefer to keep them in the fridge to prevent the chocolate from softening.Substitutions:
- Rice Crispies: Any puffed rice cereal will work for this recipe, so use whichever brand you have to hand.
- Mars Bar: While readily available in the UK, Mars Bars aren’t available worldwide. If you are in the States, Milky Ways are the equivalent of Mars Bars.
Mummy Mars Bar Slices are a fun Halloween twist on the classic Mars Bar Slice. They are made with melted Mars Bars, butter and rice crispies to create a chewy tray bake base, then decorated with white chocolate drizzled to look like mummy bandages and finished with edible candy eyes.
Yes! These Mummy Mars Bar Slices are a no-bake Halloween treat. The Mars Bars and butter are simply melted together, then mixed with rice crispies and pressed into a tin to set.
Rice crispies (or any puffed rice cereal) work best for Mars Bar Slice. They create the classic crispy but chewy texture that makes this tray bake so popular.
Free-from & Vegan:
Gluten-free: To make these a gluten-free Mars Bar Slice, swap out the Mars Bars (which unfortunately aren’t gluten-free) for Butterm!lk Caramel Nougat Bars, and the rice crispies for a gluten-free alternative.
Be sure to double-check your other ingredients for any unexpected allergens.
Nut-free: This is a nut-free Mars Bar Slice recipe.
Be sure to double-check your other ingredients for any unexpected allergens.
Egg-free: To make this an egg-free Mars Bar Slice recipe, simply swap out the Mars Bars for Butterm!lk Caramel Nougat Bars.
Be sure to double-check your other ingredients for any unexpected allergens.
Dairy-free: To make this a dairy-free Mars Bar Slice recipe, simply use a dairy-free margarine, a vegan white chocolate and Butterm!lk Caramel Nougat Bars instead of Mars Bars.
Vegan: To make this a vegan Mars Bar Slice, simply follow the dairy-free hacks above.
N.B. Any advice or suggestions to make recipes “free-from” or vegan are purely that – suggestions. Please be careful to double-check all ingredients individually, taking extra caution when serving to those with allergies & intolerances.
For more info on common food allergies, please see food.gov.uk | For more info on coeliac disease, please see coeliac.org.uk | For more info on a vegan diet, please see vegansociety.com
