Key Lime Pie Sheet Cake

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Key Lime Pie Sheet Cake is a bright, creamy cake with the flavors of key lime pie. It has a cake base, a tangy and creamy lime layer, and Cool Whip on top. This sheet cake is simple to make and great for feeding a crowd.

A slice of cake topped with whipped cream, crumbled nuts, a lime wedge, and a mint sprig on a white plate. Two copper forks are placed beside the plate.

Cooking Tips and Substitutions

If you want a stronger lime flavor, add a little lime zest to the lime layer. Be careful not to add too much, as it can become bitter. If you prefer a less sweet dessert, you can reduce the amount of condensed milk slightly.

A slice of cake with white frosting, garnished with a lime wedge and mint, is served on a plate with a fork on a cloth.

How to make Homemade Whipped Cream

For a homemade whipped topping, you can use heavy cream and powdered sugar instead of store-bought whipped topping. This will give the cake a fresher taste and a slightly different texture. Make sure to whip the cream until it forms stiff peaks before spreading it on top of the cake.

A slice of light cake topped with whipped cream, garnished with a lime wedge and mint, on a white plate.

Ingredients

The full recipe with ingredient amounts and instructions is at the bottom of this post. You can save a tree and the recipe to your personal and private recipe box here on Call Me PMc. This way, youโ€™ll never misplace it.

For the Cake

For the Lime Layer

Top Layer

A slice of Key Lime Pie Sheet Cake with creamy frosting and crumbled topping, garnished with a lime wedge and mint leaf, served on a plate.

Key Lime Pie Sheet Cake FAQ

  • Can I use a different cake mix? Yes, a yellow cake mix can work if you donโ€™t have a white cake mix. The flavor will be slightly different but still good.
  • Can I make this cake ahead of time? Yes, this cake can be made a day in advance. Store it in the refrigerator until ready to serve.
  • How should I store leftovers? Keep leftovers covered in the refrigerator for up to three days.
  • Can I use homemade whipped cream instead of Cool Whip? Yes, but it will have a softer texture and may not hold up as long in the fridge.
A slice of Key Lime Pie Sheet Cake with frosting, garnished with a lime wedge and mint, sits on a plate with a fork. A pan containing more cake is blurred in the background.

Key Lime Pie Sheet Cake Conclusion

This cake is a simple dessert with a refreshing citrus flavor. Itโ€™s easy to make with a boxed cake mix and a lime layer that adds the right amount of tartness. Perfect for gatherings, this cake is easy to make and feeds a crowd.

A slice of cake topped with whipped cream, crumbled nuts, a lime wedge, and a mint sprig on a white plate. Two copper forks are placed beside the plate.

Key Lime Pie Sheet Cake

This easy cake starts with cake mix. It has three layers: a cake layer, next is the key lime pie layer, fluffy Cool whip tops it. It's the perfect citrus dessert.
Author: Paula
4.69 from 22 votes
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Save To Your Recipe Box
Prep Time: 10 minutes
Cook Time: 30 minutes
Total Time: 1 hour 10 minutes
Servings: 15 slices

Ingredients

For the Cake

For the Lime Layer

For the Whipped Cream

Instructions

For the Cake

  • Preheat oven to 350 degrees F.
  • Spray a 9×13 inch cake pan with Wilton cake release.
  • In a bowl beat together the cake mix, milk, oil, and eggs until light and fluffy, about 2 minutes.
    1 box white cake mix, ยพ cup vegetable oil, ยพ cup whole milk, 3 large eggs
  • Pour batter into prepared pan and bake 25 to 27 minutes or until done.
  • Remove from oven and allow to cool completely before topping.

For the Lime Layer

  • In a bowl combine sweetened condensed milk and lime juice.
    14 ounces sweetened condensed milk, ยฝ cup Nellie & Joeโ€™s Key West Lime Juice
  • Whisk or mix with an electric mixer until mixture thickens. This will take 60 to 90 seconds.
  • Pour over cooled cake and refrigerate until filling sets about 15 minutes.

Put it together

  • Spread over cooled cake.
    8 ounces Cool Whip

Nutrition

Calories: 259kcal | Carbohydrates: 48g | Protein: 6g | Fat: 6g | Saturated Fat: 3g | Polyunsaturated Fat: 0.5g | Monounsaturated Fat: 2g | Trans Fat: 0.2g | Cholesterol: 50mg | Sodium: 302mg | Potassium: 177mg | Fiber: 0.5g | Sugar: 32g | Vitamin A: 175IU | Vitamin C: 3mg | Calcium: 189mg | Iron: 1mg

Nutritional information given is an automatic calculation and can vary based on the exact products you use and changes you make to the recipe. If these numbers are important to you, I recommend calculating them yourself.

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4.69 from 22 votes (15 ratings without comment)

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