Key Lime Pie Rice Krispie Treats

Key Lime Pie Rice Krispie Treats

These Rice Krispie Treats are so much fun! I made them awhile ago using my leftover Kool Aid Pop Rocks Marshmallows but they seem more suited to spring and summer. I sprinkled the top with crushed meringues to make them look like little key lime pies.

The Kool Aid really gives the squares a strong lime flavor. I didn’t add any extra food color but some green could be added to make them look more like pie.

Key Lime Pie Rice Krispie Treats

If you don’t want to make your own marshmallows stir in a packet of lime kool aid after melting some regular marshmallows. The end result should taste the same.

Key Lime Pie Rice Krispie Treats


3 tbs unsalted butter

3 cups Lime Marshmallows

6 cups Rice Krispies

Crushed meringues (I bought a package at the store and crumbled up a big handful)


  1. Lightly grease a pan with cooking spray. In a large pot melt the butter. Toss in the marshmallows and stir until melted. Add the Rice Krispies and stir until coated.
  2. Pour into pan. Press the crushed meringues on top. Cover in cling film until set and cut into squares.

An American Cupcake in London original

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  1. What a fun treat – I think kids (of the big kid variety as well!) would go crazy for these.

  2. Oh my gosh. Those are so cute! I’ve never eaten a key lime pie, but I would try one of these in a heartbeat!

  3. Franny

    I’ve been looking for an new lime pie recipe and landed on your blog! This looks delicious, can’t wait to try it!

  4. Stuart Vettese

    Love this recipe – my boyfriend will love it even more – thank you!! Loving the website and hope my 2 week old fledgling site becomes as good as yours!!

    • thanks, I like your cartoons. very cute.

      • hey there – I used your recipe as inspiration for my own creation – Black Forest Rice Krispie Treats – I hope you don’t mind! I have credited you as my inspiration (I’m a bit new to all this :))