Key Lime Icebox Cake

Why You’ll Love This Recipe

• No-Bake Convenience: Ideal for warm weather when you want to avoid using the oven.

• Tropical Flavor: The key lime custard provides a zesty, citrusy taste that's both refreshing and satisfying.

• Make-Ahead Friendly: Prepare it in advance and let it chill until you're ready to serve.

• Simple Ingredients: Uses common pantry staples and fresh limes for a homemade touch.

• Elegant Presentation: Layers create a visually appealing dessert that's perfect for gatherings.

Ingredients

(Tip: You'll find the full list of ingredients and measurements in the recipe card below.)

• ¾ cup granulated sugar

• ¼ cup cornstarch

• 4 large egg yolks

• 2 cups half-and-half

• 3 tablespoons butter

• 2 tablespoons key lime zest

• ½ cup key lime juice

• 15 graham crackers

• 1 cup heavy whipping cream

• ¼ cup confectioners' sugar

Directions

1. Prepare the Custard: In a small bowl, whisk together the egg yolks and half-and-half. In a medium saucepan, combine the granulated sugar and cornstarch. Gradually whisk the egg mixture into the sugar mixture. Cook over medium heat, whisking constantly, until the mixture comes to a boil. Continue boiling for 1 minute, then remove from heat.

2. Add Flavorings: Stir in the butter, key lime zest, and key lime juice until the butter is melted and the mixture is smooth. Let the custard cool for 10 minutes.

3. Assemble the Cake: Line an 8-inch square baking dish with plastic wrap, allowing excess to hang over the sides. Place a single layer of graham crackers on the bottom, breaking them as needed to fit. Spread ¼ of the custard over the crackers. Repeat the layers three more times, ending with a layer of graham crackers on top.

4. Freeze: Cover the cake with plastic wrap and freeze for at least 8 hours or overnight.

5. Prepare Whipped Cream: In a mixing bowl, beat the heavy whipping cream and confectioners' sugar until stiff peaks form.

6. Serve: Remove the cake from the freezer and lift it out of the dish using the plastic wrap overhang. Spread the whipped cream over the top. Let it sit at room temperature for a few minutes before slicing and serving.

Servings and Timing

• Servings: 9

• Prep Time: 35 minutes

• Cook Time: 5 minutes

• Chill Time: 8 hours

• Total Time: 8 hours 40 minutes

Variations

• Lemon Icebox Cake: Substitute key lime juice and zest with lemon juice and zest for a different citrus flavor.

• Orange Icebox Cake: Use orange juice and zest in place of key lime for a sweeter twist.

• Vanilla Wafer Layers: Replace graham crackers with vanilla wafers for a different texture and taste.

• Coconut Topping: Sprinkle toasted coconut over the whipped cream for added flavor and crunch.

Storage/Reheating

• Storage: Keep the cake covered in the freezer for up to 1 week.

• Serving: Allow the cake to sit at room temperature for about 10-15 minutes before slicing to make cutting easier.

• Reheating: This dessert is best served cold; reheating is not recommended.

FAQs

What is an icebox cake?

An icebox cake is a no-bake dessert made by layering cookies or crackers with whipped cream or custard, then chilling it until the layers meld together. The name originates from the "icebox," a precursor to the modern refrigerator.

Can I use regular limes instead of key limes?

Yes, regular limes can be used if key limes are unavailable. The flavor will be slightly different, as key limes are more aromatic and less tart than regular limes.

Do I have to freeze the cake?

Freezing helps to firm up the layers and makes slicing easier. However, you can refrigerate the cake for a softer texture, though it may be more challenging to cut clean slices.

Can I make this dessert ahead of time?

Absolutely! This cake is perfect for making ahead. Prepare and freeze it up to a week in advance. Add the whipped cream topping just before serving for the best texture.

What can I do with the leftover egg whites?

Leftover egg whites can be used to make meringue cookies, angel food cake, or added to omelets for extra protein.

Can I use store-bought whipped topping?

Yes, store-bought whipped topping can be used as a convenient alternative to homemade whipped cream.

How do I zest a lime?

Use a microplane or fine grater to remove the outer green layer of the lime peel, avoiding the bitter white pith underneath.

Can I add fruit to the layers?

Yes, adding thin slices of strawberries or kiwi between the layers can enhance the flavor and add a fresh element to the dessert.

Is this dessert gluten-free?

To make this dessert gluten-free, use gluten-free graham crackers. Ensure all other ingredients are certified gluten-free as well.

Can I double the recipe?

Yes, double the ingredients and use a 9x13-inch baking dish to serve a larger crowd.

Conclusion

This Key Lime Icebox Cake is a delightful, no-bake dessert that combines the tangy flavor of key limes with the sweetness of graham crackers and whipped cream. It's easy to prepare, make-ahead friendly, and perfect for summer gatherings or any time you crave a refreshing treat.