Key Lime Pie Rice Krispie Treats

Rice Krispie treats are SO easy and so addicting and there are about a million variations out there online. Key lime pie is one of my favorite pies, and I will happily make anything key lime flavored. America’s test kitchen did a bunch of tests years ago about whether you could taste a difference in key lime pie using regular Persian limes vs key limes and thankfully the answer was no. So you don’t need key limes, you can just use regular limes. 🙂

This is a standard rice krispie treat recipe with the addition of lime juice and zest (I just used True Lime instead), crushed up graham crackers and white chocolate chips. These only took a few minutes to make, and they really did have a good approximation of key lime pie flavor. I think the brown butter variation is still my favorite, but we aren’t going to have trouble finishing these off.

Key Lime Pie Rice Krispie Treats

key lime pie variation of rice krispie treats
Prep Time 10 minutes
Total Time 10 minutes
Course Dessert
Servings 1 pan


  • 3 tbsp butter
  • 1 10 oz bag mini marshmallows
  • 6 packets True lime or juice and zest of one lime
  • 1 cup white chocolate chips
  • 1 cup roughly crushed graham crackers
  • 5 cups rice krispies cereal
  • 1 tsp vanilla


  • Mix the cereal, graham crackers and chocolate chips in a large bowl. Grease or line with parchment and 9×13 pan. Heat the butter, marshmallows, true lime or lime juice and zest in a sauce pan over medium until melted and combined, stirring constantly. Add the vanilla.
  • Scrape this mixture into the bowl with the cereal and quickly mix well. Press into the 9×13 pan, using a greased hand to flatten it out. Allow to cool fully and cut into squares.
Keyword Dessert

Leave a Reply

%d bloggers like this: