Easy to make, no bake, crunchy, and decadent Mars bar rice krispie treats
I love making rice krispie treats for the holidays! Like these brown butter rice krispie treats and chocolate & peppermint rice krispie treats. They are always a crowd-favorite, especially with kids.
But imagine a rice krispies treat, but instead of marshmallows, you get melted caramel, nougat, and chocolate from Mars bars… These crunchy rice krispies treats are decadent and impressive. And they are super easy to make too.
Ingredients to make Mars bar slice
Mars bars (also known as Milky way in the US, but the Mars bar sold worldwide is much better in terms of flavor, in my opinion). Butter Rice krispies Semisweet chocolate chips – for the topping Coconut oil or butter – for the topping
The topping is optional, but these no bake slices just aren’t complete without a generous layer of chocolate on top!
Making the Mars bar slice recipe
Super easy. I made these often as a kid, so it even feels ridiculous to call this a recipe. But here goes… Line an 8 or 9 inch square pan with parchment paper and set aside. Cut the mars bars and place them in a pot, along with the butter. I also like to add some salt, which helps balance the sweetness. Heat the pot over medium / medium high heat and stir to melt the ingredients. Stir the mix frequently to prevent the melted chocolate mix from burning. When the chocolate bars have melted and the mix is smooth, add all the rice krispies and quickly mix it in until it’s all evenly coated. While still warm, scrape the mixture into the prepared pan. Press it into the pan to form an even layer. This is the bottom layer of your mars bar slice. To make the chocolate layer – melt the chocolate and coconut oil (or butter) until smooth. You can do this in the microwave in small bursts, or melt the chocolate over a double boiler. Pour the smooth chocolate mix over the surface of the mars bar rice krispie treat layer, and smooth it out with an offset spatula. Refrigerate until the mars bar slices have cooled and are set. Once set, they can be removed from the pan and cut into squares.
Tips for cutting Mars bar slices
Let the bars come to room temperature, so that they are easier to cut through. Use a sharp, clean, warm knife to cut the slab into squares. The warm blade helps cut through the chocolate layer. Wipe the blade clean between cuts.
Storing the slices for later
I’ve kept these mars bar slices in an air-tight container and in the fridge for over two weeks. They keep really well. But do let them rest at room temperature for a bit before eating. This lets the Mars bar rice krispie layer soften a little. You could also store these in the freezer for up to 6 months. Then let them fully thaw out before eating.
Final recipe notes
These no bake rice krispie bars are a nostalgic shout out to my childhood! I loved making Mars bar slices because they were addictively delicious, and so easy to make. These are great for gift giving during the holidays too! They make the perfect addition to treat boxes during Christmas or special occasions.
