I was asked to make a Key Lime wedding cake with Raspbery filling and Key Lime bc. I ended up using a combination of ingredients from two different recipes. It has been a favorite of many since. This makes a very moist cake or cupcakes!

Key Lime Cake With Key Lime Buttercream


  • Key Lime Cake:
  • 1-(18.25oz.) lemon or yellow cake mix
  • 1-3.5oz. instant lemon pudding mix (dry)
  • 4 large eggs
  • 1/2 cup key lime juice (bottled)
  • 1 cup vegetable oil
  • 1/2 cup water

  • Key Lime Buttercream:

  • 1 cup unsalted butter
  • 1 cup Crisco
  • 2 teaspoons real vanilla
  • 1/4 teaspoon salt
  • 8 cups powdered sugar
  • 6 tablespoons key lime juice (more if desired for consistensey and flavor)


    Directions for Key Lime cake:

  1. 1.Preheat oven to 325 degrees.
  2. 2.Combine above ingredients and beat with electric mixer for 2-3 minutes
  3. 3.Pour into prepared pans and bake for 45 min. or until done. Cool for 10 minutes and turn out from pans.
  4. *It has been a while since I made this cake. I can’t remember what size pans I used. I used either 2-8″ rounds or 2-9″ rounds.
  5. Directions for Key Lime Buttercream:
  6. Beat butter and shortening together for about 5 minutes. Beat in vanilla and salt. Add powdered sugar 1 cup at a time alternating with the key lime juice.


GottaLuvCake Says... 8 Sep 2009 , 2:27pm

Was this buttercream recipe made when Crisco had trans fat in it??? I truly believe it makes a difference, just curious? I am going to try this as i have been craving key lime!!!!

CakeDivas Says... 21 Sep 2009 , 9:12am

I am making a key like cake for a wedding next spring and was experimenting with fresh lime juice and buttercream, but I found that the fresh juice broke down the fat in the buttercream. Does using bottled keylime juice make a dfference?

kdmoffett Says... 17 Nov 2009 , 4:01pm

Using the bottled lime juice worked great for me... making this cake a second time... my mother loved and requested it for my aunt's birthday! It is awesome!

peachcake Says... 25 Dec 2009 , 10:16pm

Made this cake for a customer. Came out great! If the cake taste half as good as the buttercreme did, it is out of this world. icing was so creamy and delish! Will make this again. Used a convection oven and it baked perfectly. Thanks!

jgrob3 Says... 12 Jan 2010 , 1:29pm

A MAZING!!!!!!!

kenskakes Says... 22 Feb 2010 , 6:04pm

i love key lime pie and made this recipe over the w/e with ddaigle's "easy raspberry filling" it was a huge success!!!!! :-) so moist - just melts in your mouth and the combination of flavors with the filling was just DIVINE!!!! took it for a gathering after church and no lie - the cake was gone within 10 mins - people were talking about it all over the room!!!! can't wait to make it again and take it into work this friday - thanks so much for sharing!!!!!

kenskakes Says... 24 Feb 2010 , 2:36pm

COREECTION - i used the raspberry filling resipe posted by sweet_indulgence - Delicious!!!!!!!

cocobean Says... 25 Mar 2010 , 12:24pm

I have to say that I do use high ratio shortening in the bc but I posted the recipe using Crisco because not everyone can get high ratio. Use the high ratio shortening if you have it.

Gerhop Says... 7 Apr 2010 , 6:47pm

YUUUUUMMMMMYYY!! Really wonderful, the buttercream was absolutely amazing!

saraisweets Says... 18 Apr 2010 , 2:04pm

This cake is amazing! It was a huge hit. This is my new favorite flavor!.

iannelli66 Says... 4 May 2010 , 9:06am

I am making a coconut cake this weekend and was looking for a key lime filling.. Cant wait to try this buttercreme recipe with the coconut cake!

Niki0517 Says... 11 May 2010 , 5:40am


lissergirl Says... 25 May 2010 , 8:30am

This cake and buttercream are AMAZING! I wanted to try something cool and light for a church lunch being held outside this weekend. When I got to the church, we had a LOT of cakes and I was concerned we might not even need to cut my cake but the other ladies insisted. Everyone went CRAZY over this cake!! It was GONE in no time flat. This is my new favorite!

lindseyry Says... 14 Jun 2010 , 8:42am

I bought vanilla pudding by mistake. But because I doubled the recipe I added one box of vanilla pudding and one box of lime jello. I also used white mix vs yellow. The cake was AMAZING! Was used for a wedding and was a HUGE hit!! Thanks so much!

Hollandy Says... 21 Jun 2010 , 1:45am

I baked a different cake (I can't get mixes here without paying outrageous prices) but used the key lime buttercream recipe from here and it was delicious! It made a HUGE batch though, and I only had a 9x13 in cake so I have a ton of yummy buttercream leftover. I guess I need to make some cupcakes for the office to use it up! thanks for sharing.

Marla84 Says... 7 Jul 2010 , 11:24am

Does the key lime juice affect the color of the buttercream icing?

divinecc Says... 20 Jul 2010 , 9:57pm

Yummmm! This is the best recipe, everyone loved it and I saved a piece for a bride to test, needless to say she ordered this flavor. Thanks so much for sharing. I used 1/2 lemon 1/2 white DH cake mix with my strawberry filling.

GailG Says... 26 Jul 2010 , 1:49pm

I love this recipe - I made it for co-workers and they have all requested I bring it again and again! Thank you for sharing! This is a favorite for sure in my house!

BethanyBakes Says... 29 Jan 2011 , 1:10pm

This is going to be my Daughter's 5th Birthday Cake. I just carved the shape of the cake and ate a chunk of the throw-aways...soooo limey and delicious! The cake is also perfectly dense and moist, easy to carve and strong enough to stack. I am making the raspberry filling right now to go between the layers. Can't wait for the party and for all to taste!

ashlynsbowtique Says... 24 Feb 2011 , 7:51pm

I really want to make this cake this weekend for my sisters birthday but I have a question. Where do you find Key Lime Juice?? You're not just meaning lime juice like you would buy lemon juice are you? Do I get it in like the mixed drinks section near the alcohol? Thanks!!

ashlynsbowtique Says... 25 Feb 2011 , 12:54pm

okay so I found sweetened lime juice in the mixer section of my grocery store. Hoping it will work. Gonna give it a try when the kids take a nap. Wish me luck! :P

glow0369 Says... 7 Mar 2011 , 4:18pm

This is the second time I have made this, and it was super great, but I got my hands on REAL KEY LIMES and used them instead of the bottled and WOW...real key lime flavor.. so much better than bottled...

TheOtherCakeLady Says... 3 Apr 2011 , 9:38pm

I made this with bottled lime juice, and it was a real hit! Can't wait to find some real key limes to taste the difference. Can't imagine the cake and buttercream tasting even better! This recipe is a real keeper!

JenCuppyCakes Says... 14 May 2011 , 6:54pm

I can't wait to try this buttercream out, especially after all the good reviews! I am getting married, and making my own cake (crazy I know, but hey, it's what I do so I know I'll get it the way I want it!l lol), and my hubby-to-be loves, LOVES key lime. This will be a wonderful surprise for him!!

beth1 Says... 19 May 2011 , 9:02am

I made this cake using the recipe as written and using 8" pans. The cake didn't rise very much. I thought I did something wrong so I did it again and got the same results. Is this normal for this cake? I used bottled Key Lime Juice that had a current date on it. The cake mixes had a current date, eggs were fresh. The texture was good and the taste wonderful, just short for a 2 layer cake. Please comment. Thanks. BTW My husband loves this cake.

dcabrera Says... 20 May 2011 , 10:50am

The flavor is good, but WAY TOO GREASY!! One cup of oil? Really? Next time I will try to make it with maybe half the amount of oil.

NomsbyNikki Says... 25 Jul 2011 , 9:55am

Does this buttercream crust? I'm looking for a crusting key lime buttercream.

NomsbyNikki Says... 25 Jul 2011 , 9:57am

Also, can you use vanilla extract instead of real vanilla?

SweetDelites Says... 26 Jul 2011 , 10:29am

I love this cake. It has been made twice, the second time my son tried to help me by making this while I was making buttercream for a cake show.So he put in banana pudding mix instead of lemon, as he was mixing I could smell bananas,but didn't know why. While the cake was in the oven I saw the box to the pudding, boy was I mad, I had no time to redo it. Thankfully his mix- up turned out to be a hug hit, he gets request for it alot. He calls it banana lime mix-up

JillianLynn Says... 28 Aug 2011 , 6:24am

I made this cake yesterday for my 3-year-olds birthday that we had in Florida and it was a HUGE hit! I read all of the comments and wanted to answer some of the questions: I used Nellie & Joes key lime juice. You can look it up on the net and see where you can get it near you (Super Target and Albertsons for me.) Real key limes give you a little "after bite" that regular lime juice does not. I made the recipe exactly as written, except that I did add more lime juice to the icing. The icing was soft, but I was just planning on icing the cake with it, so I didn't mind. I doubled the recipe for the batter and it was perfect for 9" round, 2" deep pans. I made 1 1/2 recipes of the frosting, which turned out to be way too much for just icing the cake. Could have made just one recipe. I didn't use the rasberry filling, I just used the icing. The icing did crust somewhat, I was able to use a hot spatula on it to smooth it. I used regular icing to decorate the cake and it looked and tasted great!!

GailG Says... 15 Sep 2011 , 11:37am

I have made this several times and it is always a big hit...wonderful recipe and a keeper. It is requested by coworkers often than you for sharing.

cocobean Says... 5 Oct 2011 , 8:31am

Glad everyone is enjoying this recipe. I think I have to agree with dcabrera that the 1 cup of oil is a bit much. Although, it does taste really good it does seem a little greasy to me to. Lately I have been using a little less oil in the recipe. You may want to try 3/4 cup oil sometime or even 2/3 cup. Taste is still really good. Also, beth1 I believe it is normal for this recipe to not raise as much. You might want to use 7" pans and see how it goes. I noticed the cupcakes don't raise as much either so you can probably put a little more batter in the cup and OR try baking at 350 degrees for cupcakes instead.

proudmommaof3 Says... 7 Oct 2011 , 11:21am

This is the most sinfully delicious cake and buttercream I have ever tasted. So simple and so yummy. I took advice and only put 2/3 cup of oil in my cake batter and extra key lime juice in both my frosting and cake and it made my tastebuds pop! Will definitely make this again and again and again!

proudmommaof3 Says... 7 Oct 2011 , 11:22am

I also made cupcakes with this recipe and filled them pretty close to the top and they came out perfect.

candacethecook Says... 30 Jan 2012 , 8:09pm

I agree with their being too much oil. I cut the oil in half and use half plain apple sauce just as I do with carrot cake recipes.

epatric059 Says... 24 Feb 2012 , 1:55pm

I can not wait to make this cake! After reading the reviews, it looks amazing. One question, do I need to refrigerate this cake?

sweetpeacakemom Says... 27 Feb 2012 , 6:47am

I made this cake this weekend and I just want to say thank you for sharing! The cake was fabulous and the frosting is even more fabulous!! I cut the oil down to 2/3c in the cake and it was still a little "oily" but still tasted wonderful. I don't even like key lime-flavored anything...but this is a new favorite :D Thanks again!!

cocobean Says... 5 May 2012 , 8:36am

It has been called to my attention that the oz. of pudding mix is incorrect. It should read 3.4oz instead of 3.5oz. **Also, just a note of caution, make sure you don't confuse the small box of sugar free Jell-O which is 1oz., and use to much.

shannon1025 Says... 17 May 2012 , 9:42am

This is seriously my favorite. Now every cake I do I want to do the Keylime, the only thing I do different is I use Paula Dean's cream cheese recipe on line and add key lime juice, amazing!

kstroud03 Says... 25 Jun 2012 , 7:40am

Yummy! I made this for a bridal shower cake for a couple getting married on the beach. They have requested it for the wedding cake too. I made it using 1/2 cup oil as others suggested. I used the key lime buttercream as the filling and used my usual buttercream recipe to ice/decorate. It is one of my favorite flavors!

Ians_Mommy Says... 2 Sep 2012 , 1:11pm

OMG This is amazing!! I just finished baking this and making the buttercream. I made it exactly as the recipe stated and I can't believe how how awesome this cake is!! Luckily I had some to taste when I leveled it -- so GOOD!!! I filled it with a raspberry filling. I can't wait for my family to try it tomorrow, I hope they love it as much as I do.

kimber59 Says... 17 Oct 2012 , 11:13am

I tried this recipe today. It was a huge hit. Thank you so much for sharing your recipe with us. I iced it with coconut icing.

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