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Key Lime Pie Rice Krispie Treats

A zesty, no-bake fusion dessert combining the gooey perfection of classic marshmallow cereal treats with the bright, citrusy flavors and graham cracker crunch of key lime pie.
Print Recipe
Prep Time 10 minutes
Cook Time 5 minutes
Cooling Time 1 hour
Total Time 15 minutes
Servings: 16 Squares
Course: Dessert, Snack
Cuisine: American
Calories: 180
Ingredients Equipment Method Notes

Ingredients
  

Treat Base
  • 0.5 cup unsalted butter 1 stick
  • 1 bag mini marshmallows 10-ounce bag, plus 1 cup reserved
  • 1 tbsp fresh key lime zest about 3-4 small key limes
  • 2 tbsp fresh key lime juice
  • 0.5 tsp pure vanilla extract
  • 0.25 tsp fine sea salt
  • 6 cups crisped rice cereal like Rice Krispies
  • 1.5 cups graham crackers roughly chopped
  • 0.5 cup white chocolate chips optional

Equipment

  • Large heavy-bottomed pot
  • 9x9-inch baking dish
  • Silicone spatula
  • Parchment paper

Method
 

  1. Line a 9x9-inch baking dish with parchment paper and lightly grease it.
  2. In a large pot, melt the butter over low heat.
  3. Add the 10-ounce bag of mini marshmallows to the butter, stirring constantly until completely melted and smooth.
  4. Remove from heat immediately. Stir in the key lime zest, key lime juice, vanilla extract, and sea salt.
  5. Fold in the crisped rice cereal and chopped graham crackers until evenly coated with the marshmallow mixture.
  6. Gently fold in the remaining 1 cup of mini marshmallows and the white chocolate chips (if using).
  7. Transfer the mixture to the prepared baking dish and gently press it into an even layer using a buttered spatula.
  8. Allow the treats to cool and set at room temperature for at least 1 hour before cutting into squares.

Notes

Always use fresh marshmallows and melt them over low heat to prevent the treats from becoming hard and difficult to eat.