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These Mars bar squares are an easy no bake treat that will take you 10 minutes and only a few ingredients to make! Everyone will love these Mars bar rice krispie squares!

mars bar squares

I may not have mentioned this before, but growing up I had a peanut allergy! This meant that at Halloween time, what felt like all of my candy got snatched away after all of my hard work. To be fair, that candy was replaced by nut-free candy, but it was still a disappointing feeling! Anyway, mars bars were always a safe bet and I loved them. What’s not to love about caramel and nougat!?

Also – if you’ve never had a Mars bar, they’re a staple in all convenience stores and have been for years. I have used them in a few of my other recipes, such as my candy jar ice cream, but in this super easy recipe they really get to shine!

Ingredients for Mars Bar Squares

I’m so glad I get to add another easy recipe to my lineup of easy treats! Last week was the white chocolate popcorn, and this week it’s even easier. For this recipe you’ll need:

  • full sized Mars candy bars
  • unsalted butter
  • semi-sweet chocolate chips
  • crisped rice cereal

Mars bars: If you can’t find Mars chocolate bars where you are, you can certainly just use something similar. Find something with caramel and nougat and not a lot of other extra ingredients.

Directions for Making Mars Bar Rice Krispie Squares

1. Unwrap all of the Mars bars, and chop them into pieces. Reserve a 1/4 cup of the pieces for later.

2. In a large pot over medium heat, melt the butter until it’s just melted, then add the chopped Mars bars (minus the extra 1/4 cup). Stir the mixture until everything is smooth, then remove the pot from heat and add in the crisped rice cereal and remaining 1/4 cup of Mars bars. Stir everything with a wooden spoon until the cereal is completely coated in the chocolate.

3. Empty the mixture into a greased 8″x 8″ pan, then gently spread it out. In another bowl, heat together the remaining unsalted butter and chocolate chips, stirring together until smooth. I usually place the butter and chocolate chips in a microwave-safe bowl and heat it on high for about 30 seconds, stirring after until smooth.

4. Spread the chocolate topping over the top of the bars, then sprinkle a few extra Mars bars on top if desired. Let the bars harden for an hour in the fridge before slicing and serving!

How Long Do Mars Bar Squares Last?

If you keep these no bake bars in the fridge, in an airtight container, they would last for up to 2 weeks. They’ll stay fresh at room temperature, in an airtight container, for up to 1 week.

You could also choose to freeze these bars, in which case they’d last for up to 2 months, or longer! Just be sure to thaw them overnight in the fridge before you’re ready to serve them. I think they’d be delicious even frozen, but you’d have to be careful you don’t chip a tooth!

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How Many Servings Does This Recipe Make?

I chose to cut the bars into 16 squares and the bars were fairly large for a single portion. I think you could cut them even smaller to have up to 32 pieces, and they’d be a good bite sized square.

If you’re feeding a crowd and want to double the recipe, just double all of the ingredients and use a 9″ x 13″ pan instead. Everything else will be identical, except that you’ll be reserving 1/2 cup of extra chopped Mars bars to incorporate along with the crisped rice, rather than 1/4 cup.

This recipe is very easy to double, or even quadruple as long as you account for the size of the pan you’ll need! Or work with 2 pans at once.

Mars bar squares
Mars bar squares

Other Easy Treats From the Blog

I’m all about the simple, short ingredient lists around here! Here are a few other treats I think you’ll love.

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mars bar squares

Mars Bar Squares


  • Author: Katherine | Love In My Oven
  • Total Time: 20 minutes
  • Yield: 16 bars 1x

Description

These Mars bar squares are an easy no bake treat that will take you 10 minutes and only a few ingredients to make! Everyone will love these Mars bar rice krispie squares!


Ingredients

Scale
  • 5 full-sized Mars bars, divided (52 grams each)
  • 3/4 cup unsalted butter, divided
  • 3 1/2 cups crisped rice cereal
  • 1 cup semi-sweet chocolate chips

Instructions

  1. Unwrap all of the Mars bars, and chop them into pieces. Reserve 1/4 cup of the chopped bars for later.
  2. In a large pot over medium heat, melt 1/2 cup of the butter until it’s just melted, then add the chopped Mars bars (minus the extra 1/4 cup). Stir the mixture until everything is smooth, then remove the pot from heat and add in the crisped rice cereal and remaining 1/4 cup of Mars bars. Stir everything with a wooden spoon until the cereal is completely coated in the chocolate. 
  3. Empty the mixture into a greased 8″x 8″ pan, then gently spread it out. In a small heat safe bowl, microwave the remaining 1/4 cup unsalted butter and chocolate chips on high for 30 seconds, stirring until smooth.
  4. Spread the chocolate topping over the top of the bars, then sprinkle a few extra Mars bars on top if desired. Let the bars harden for an hour in the fridge before slicing into 16 pieces.

Bars can be stored at room temperature, in an airtight container, for up to 1 week, or up to 2 weeks in the fridge. You can also freeze the bars for up to 2 months, thawing in the fridge overnight.

Notes

If you can’t find Mars bars, just look for a similar chocolate bar that contains only chocolate, caramel and nougat.

  • Prep Time: 10 minutes
  • Cook Time: 10 minutes
  • Category: brownies
  • Method: no bake
  • Cuisine: american

Keywords: Mars bar squares // Mars bar cookies // Mars bar Rice Krispie squares

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Mars Bar Squares

About Katherine

Heeey! Thank you for stopping by! I like 30-minute dinners and giant peanut butter cups made with only 3 ingredients. I LOVE food! If you do too, you're in the right place.

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