If you adore the tangy brightness of key lime pie but want something quicker and playfully crisp, then the Key Lime Pie Rice Krispie Treats Recipe is your next sweet obsession. This delightful dessert takes the nostalgic crunch of classic Rice Krispies treats and layers it with luscious key lime juice and zest, marrying tart citrus notes with marshmallowy, buttery comfort. It’s an easy, no-bake, and totally crave-worthy dessert that brings a sunny twist to any occasion, perfect for sharing with friends or sneaking a few squares just for yourself.

Key Lime Pie Rice Krispie Treats Recipe - Recipe Image

Ingredients You’ll Need

These ingredients are simple pantry staples, yet each one plays a crucial role in creating that perfect balance of flavors and textures. From buttery marshmallow bases to zesty lime accents and the satisfying crunch of cereal and graham crackers, this recipe is both approachable and rewarding.

  • Unsalted butter (3 tablespoons): Provides richness and helps melt the marshmallows smoothly for that irresistible chewy texture.
  • Mini marshmallows (1 10-ounce bag): The gooey binder that brings everything together with its sweet, pillowy magic.
  • Key lime juice (1 tablespoon): Adds authentic tartness that brightens the entire treat, giving it that signature lime punch.
  • Key lime zest (1 teaspoon): Offers a fragrant citrus aroma and an extra burst of lime flavor beyond the juice.
  • Vanilla extract (1/2 teaspoon): Balances the tartness with warm sweetness and enhances overall depth.
  • Rice Krispies cereal (5 cups): Classic crispy crunch that’s light enough to let the lime flavors shine through.
  • Crushed graham crackers (1 cup): Adds a subtle buttery, slightly crunchy texture that complements the lime pie inspiration.
  • White chocolate chips (1/2 cup, optional): Offers a creamy sweetness and melty contrast when folded in after cooking.
  • Extra lime zest for garnish (optional): Provides a pretty and aromatic finishing touch.

How to Make Key Lime Pie Rice Krispie Treats Recipe

Step 1: Melt the Butter and Marshmallows

Start by melting 3 tablespoons of unsalted butter in a large pot over medium heat. Once melted, add the entire bag of mini marshmallows and stir continuously until they’re completely melted and silky smooth. This gooey base is crucial—it’s what holds all the crunchy bits together, creating that irresistible chewiness you crave.

Step 2: Add Lime and Vanilla Flavorings

With the pot off the heat, stir in 1 tablespoon of key lime juice, 1 teaspoon of zesty key lime zest, and 1/2 teaspoon of vanilla extract. These ingredients transform the traditional marshmallow base into a lively tropical delight, delivering that unmistakable lime pie zing in every bite.

Step 3: Incorporate Cereal and Graham Crackers

Quickly fold in 5 cups of Rice Krispies cereal along with 1 cup of crushed graham crackers. Mixing these in while the marshmallow is still warm ensures everything gets a perfect coating, creating a lovely blend of textures. The crushed graham crackers mimic the pie crust, making these treats wonderfully reminiscent of the classic dessert.

Step 4: Fold in White Chocolate Chips (Optional)

If you’re feeling indulgent, gently stir in 1/2 cup of white chocolate chips after the mixture has cooled slightly but is still pliable. They add a luscious creaminess that pairs beautifully with the tart lime notes, making these treats extra special.

Step 5: Press and Cool

Transfer the mixture to a greased 9×9-inch baking pan. Use a buttered spatula or a piece of wax paper to press the treats evenly into the pan. Let them cool completely at room temperature for the best texture and ease of slicing. Once set, cut into 12 squares for perfect portioned treats.

How to Serve Key Lime Pie Rice Krispie Treats Recipe

Key Lime Pie Rice Krispie Treats Recipe - Recipe Image

Garnishes

To elevate the presentation and flavor, sprinkle extra fresh lime zest on top of each square just before serving. This simple garnish not only looks vibrant but also refreshes the palate with an extra citrus boost, making each bite feel even more festive and lively.

Side Dishes

These treats shine best on their own but pair wonderfully with a cool dollop of whipped cream or a spoonful of vanilla ice cream for a dreamy dessert. For a party, serve alongside fresh berries or a chilled citrus punch to keep the theme bright and refreshing.

Creative Ways to Present

For a fun twist, cut the Key Lime Pie Rice Krispie Treats into bite-sized balls or use cookie cutters for festive shapes. Wrap individual portions in parchment paper tied with twine for charming party favors. You can even drizzle melted white or dark chocolate in a zigzag pattern on top for a pretty finishing touch that guests will admire.

Make Ahead and Storage

Storing Leftovers

Store any leftover treats in an airtight container at room temperature to keep them fresh and chewy. They’ll stay delicious for up to 3 days, but honestly, they rarely last that long!

Freezing

If you want to save these for later, wrap individual squares tightly in plastic wrap and place them in a freezer-safe container. Freeze for up to 2 months. To enjoy, just thaw at room temperature for about 30 minutes to regain that perfect marshmallow softness.

Reheating

These treats are best enjoyed as-is, but if you’d like a warm, melty experience, microwave a square for about 10-15 seconds. Just be careful not to overheat or they might become too soft and sticky.

FAQs

Can I use regular lime juice instead of key lime juice?

Absolutely! While key lime juice gives the most authentic flavor, regular lime juice works well and is more accessible. Just adjust the quantity to taste.

What if I don’t have graham crackers?

You can substitute crushed digestive biscuits or even vanilla wafer cookies. These provide a similar texture and slight sweetness that complements the lime.

Are these treats gluten-free?

Traditional Rice Krispies and graham crackers contain gluten, so these treats are not gluten-free as written. However, you can use gluten-free crispy rice cereal and gluten-free graham crackers to make them safe for gluten-sensitive diets.

Can I make these vegan?

To make a vegan version, use dairy-free margarine or coconut oil, vegan marshmallows, and ensure all other ingredients, like white chocolate chips, are dairy-free. The texture may differ slightly but they’ll still be delicious!

How long do these treats stay fresh?

Stored properly in an airtight container, these treats stay fresh for about 3 days at room temperature. For longer storage, freezing is best.

Final Thoughts

So there you have it — a bright, cheerful twist on the classic Rice Krispie treat that’s bursting with zesty key lime flavor. The Key Lime Pie Rice Krispie Treats Recipe is simple enough for a quick snack yet impressive enough for any dessert table. Give it a try and watch these sunny, tangy treats become a new favorite in your sweet recipe collection!

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Key Lime Pie Rice Krispie Treats Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4 from 80 reviews
  • Author: Emma
  • Prep Time: 10 minutes
  • Cook Time: 5 minutes
  • Total Time: 15 minutes
  • Yield: 12 squares
  • Category: Dessert
  • Method: Stovetop
  • Cuisine: American
  • Diet: Vegetarian

Description

These Key Lime Pie Rice Krispie Treats combine the nostalgic crunch of classic Rice Krispies with the bright, tangy flavors of key lime juice and zest. Enhanced with a hint of vanilla and optional white chocolate chips, this easy no-bake dessert is perfect for summertime or any occasion where a refreshing sweet treat is desired. Quick to prepare on the stovetop and set without baking, these bars offer a delightful twist on a childhood favorite.


Ingredients

Scale

Base Ingredients

  • 3 tablespoons unsalted butter
  • 1 (10 oz) bag mini marshmallows
  • 5 cups Rice Krispies cereal
  • 1 cup crushed graham crackers

Flavorings

  • 1 tablespoon key lime juice
  • 1 teaspoon key lime zest
  • 1/2 teaspoon vanilla extract

Optional Additions

  • 1/2 cup white chocolate chips
  • Extra lime zest for garnish


Instructions

  1. Melt the Butter and Marshmallows: In a large pot over medium heat, melt the unsalted butter. Add the mini marshmallows and stir constantly until they are fully melted and the mixture is smooth, ensuring there are no lumps.
  2. Add Lime and Vanilla Flavors: Remove the pot from heat. Stir in the key lime juice, key lime zest, and vanilla extract to infuse the marshmallow mixture with bright citrus and warm vanilla notes.
  3. Mix in Dry Ingredients: Quickly fold in the Rice Krispies cereal and crushed graham crackers, stirring gently but thoroughly until all pieces are evenly coated with the marshmallow mixture.
  4. Incorporate White Chocolate Chips (Optional): If using, fold in the white chocolate chips once the mixture has slightly cooled but is still pliable, so the chips don’t melt completely and add pockets of creamy sweetness.
  5. Press into Pan and Cool: Transfer the mixture into a greased 9×9-inch baking pan. Using a buttered spatula or wax paper, press the mixture down firmly and evenly to compact it into an even layer.
  6. Let Set and Garnish: Allow the treats to cool completely at room temperature until set. Once firm, slice into 12 squares and garnish with extra lime zest if desired for a vibrant presentation and extra zing.

Notes

  • For a stronger lime flavor, add a few drops of lime extract along with the lime juice and zest.
  • Use fresh key lime juice and zest whenever possible for the best, most authentic flavor, though bottled juice is acceptable.
  • Store the treats in an airtight container at room temperature for up to 3 days to maintain freshness and texture.

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