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    Home » Cake

    Key Lime Cake

    Published: Mar 2, 2020 · Modified: Mar 25, 2025 by Kim Strawn This post may contain affiliate links. Leave a Comment

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    Easy Key Lime Cake has punch of flavor in every bite. Easy from start to finish, this cake will be a hit for family and guests alike! This fresh lime cake starts with a cake mix so it is so easy to put together.

    key lime cake on a white plate.

    What does key lime flavor say to you? Sun? Summer? Maybe some beach involved? For me it is all the above. So when I bite into this Key Lime Cake, I am taken away to someplace warm and sunny. Even if it is 30 degrees outside.

    Key lime cake has that punch of flavor that does a dance in your mouth. No really, it does. The citrus of the lime mixed with the citrus of the lemon, makes it so refreshing and delicious. Like with these Simple Lime Bars or when you use orange as the base as with this Mandarin Orange Cake.

    Jump to:
    • Can I substitute regular lime juice for key lime juice?
    • How to make this easy cake
    • Frosting
    • 📖 Recipe
    • Drinks to serve with this cake
    • 💬 Reviews
    • lemon cake mix
    • instant vanilla pudding - any brand will work
    • water
    • oil
    • eggs
    • key lime juice 
    • lime peel
    key lime cake on a serving tray.

    Can I substitute regular lime juice for key lime juice?

    Yes, you can. When substituting regular lime juice for key lime juice, you will want to add more lime juice to get that flavor since key limes are so flavorful. In this recipe, it calls for 5 tablespoons of key lime juice so you would add 7 tablespoons of regular lime juice.

    You may find that the flavor it okay for you to go with the original amount, but I feel it would need a little extra to make the flavor pop.

    Cake batter in a mixing bowl with lime peel

    I also added some lime peel to the batter for additional flavor. If you need a citrus grater, this one is a good one to have.

    How to make this easy cake

    You start with a lemon cake mix. The cake mix can be any brand, I prefer Betty Crocker or Duncan Hines. Then add vanilla pudding (dry), water, oil, eggs and key lime juice. You will need to mix with a stand mixer or hand held mixer for at least 2 minutes.

    To bake, I put this cake in a bundt pan. You can also use a 9x13 pan. I personally like the look of this cake in a bundt pan and I believe the frosting for this key lime cake recipe looks nice on a bundt pan. However, either will work and taste good!

    Cake in a bundt pan

    Frosting

    The frosting is a simple recipe of powdered sugar and, you guessed it, more key lime juice. It is more of drizzle than a thick frosting.

    key lime cake with limes nearby.

    What you end up having is a delicious and easy cake recipe that is full of flavor and is wonderful for a brunch, lunch or gathering.

    📖 Recipe

    key lime cake on a white plate.

    Easy Key Lime Cake

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    This easy key lime cake is full of flavor. It starts with a cake mix and comes together so easily.
    Course Cake
    Cuisine American
    Keyword dessert, key lime
    Prep Time 15 minutes minutes
    Cook Time 40 minutes minutes
    Total Time 55 minutes minutes
    Servings 10 slices
    Calories 449kcal
    Author Kim Strawn
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    Ingredients

    • 1 box lemon cake mix
    • 3.4 oz instant vanilla pudding
    • 1 cup water or the amount on the back of the cake box
    • ½ cup oil or the amount on the back of the cake box
    • 4 eggs or the amount on the back of the cake box
    • 5 T key lime juice or 7 tablespoons regular lime juice
    • 2 teaspoon lime peel grated, optional

    Frosting

    • 2 cups powdered sugar
    • 7 T key lime juice adding more if needed for drizzling consistency

    Instructions

    • Preheat oven to 350℉.
    • Mix together cake mix, pudding, water, oil, eggs and key lime juice in a large mixing bowl. Mix with stand mixer or hand mixer for 30 seconds on low speed and 2 minutes on medium speed.
    • Pour into a greased Bundt pan.
    • Bake at 350℉ for at 40 minutes or when cake tests done.
    • Cake is done with toothpick (or knife) inserted near the center comes out clean.
    • Remove from oven and let cool for 10 minutes. Loosen sides from Bundt pan with a knife and turn over on a plate or serving dish.
    • Let cool another 20 minutes.

    Frosting

    • Mix together powdered sugar and key lime juice in a small bowl.
    • You may add more juice depending on the consistency. You want drizzling consistency.
    • Drizzle over cooled cake.
    • Serve.

    Notes

    Use the amount listed on the back of the cake box for the eggs, oil and water. 

    Nutrition

    Calories: 449kcal | Carbohydrates: 77g | Protein: 4g | Fat: 14g | Saturated Fat: 2g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 8g | Trans Fat: 0.2g | Cholesterol: 65mg | Sodium: 465mg | Potassium: 72mg | Fiber: 1g | Sugar: 54g | Vitamin A: 104IU | Vitamin C: 6mg | Calcium: 123mg | Iron: 1mg
    Pin This Recipe!Follow Me on Pinterest @bakingwithmom6!

    Drinks to serve with this cake

    • Frosted Lemonade
    • Strawberry Pineapple Drink
    • Easy Strawberry Lemonade
    • Orange Julius Recipe

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      Apple Cider Cupcakes

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    Kim Strawn owner of Baking With Mom.

    Hey There, I'm Kim! I am the owner and recipe creator here at Baking With Mom. I'm also a mom to 4 growing kids so I understand busy! Here you will find recipes that are quick, delicious and can get on the table fast. Read more about me.

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