Key Lime Pie Dip

So remember back in the 90’s when “fat free” was a thing?

I was all over that.

Because I could “diet” while eating handfuls of gummy worms, Sweet Tarts and Fun Dip.  It was basically the best diet fad ever.

And then those Fat Free Snackwell’s cookies came out and completely ruled my college years.


Ahhh, the 90’s were a good time.

I may or may not have eaten those cookies by the boxful.

They’re fattttt freeeeee we would tell ourselves sitting on the floor of our 9×11 college dorm room.  Because everyone knows that if something is “fat free” you can eat an infinity amount and it doesn’t count.  It was glorious.


Until my jeans didn’t fit.

I had to quit the fat-free.  It was making me fat-expensive.


But here’s the thing.

I made this dip.

Actually by accident…I was trying to make something entirely different, and before I knew it, I had licked the whole bowl clean, deeming this “dip”, due to the number of belly flops my finger did into the bowl.

“Dip” is a nicer name than “a bowl of stuff that you ate with your finger because you couldn’t wait to for it to fully ‘set up’,  because you’re a  fatty” dessert.

And then “for research” I made the dip again…and I made it fat free, because I was feeling Snackwell’s-nostalgic.

Which is actually a condition.

Look it up.


ps ~ having tasted both the full-fat and fat-free versions of this dip, make the fat free, they taste the same…save your fat for a Reese’s Cup.


Fat Free Key Lime Pie Dip.

PhotobucketThis is basically the easiest dessert ever.

3 ingredients, a bowl, a whisk and you’re done.

Mix some Key Lime Juice and sweetened condensed milk together…


The acidic fruit juice combined with the SCM thickens the mixture without heating…it’s all sciency and stuff…

PhotobucketThe for added measure I plopped in some Marshmallow Fluff.  Just for a little something extra.


I let it chill for a bit and then dove in.  Literally.






  • 1 (14 oz) can fat free sweetened condensed milk
  • 1/4 cup + 2 Tbsp Key Lime Juice
  • 1/2 cup Marshmallow Fluff
  • graham crackers/fruit to dip


  1. In a medium bowl whisk together the sweetened condensed milk and key lime juice until thickened, approx 30 seconds.
  2. Add in the Fluff and continue stirring until incorporated.
  3. Chill for at least an hour.
  4. Serve chilled with graham crackers and/or fruit


full fat sweetened condensed milk can be used in place of fat free.


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54 Comments on "Key Lime Pie Dip"

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Colleen @ What

This looks like the perfect summertime dip! Great to bring to a party!

Cookbook Queen

Gah. I love those Snackwells. But they are health food, so I don’t buy them that often.

This is basically the most perfect key lime thing ever. Like pie for the lazy person!!


I bet this would be great as a pie with some fat free cool whip on top!!!

Erin @ The Spiffy Cookie

Oh my goodness this is such a great dip!

sally @ sallys baking addiction

I soooo wish I could live off of gummi worms, mike n ikes, gum balls, those little sour gummi watermelons. Man those are the best! I don’t have the patience to ever make a real key lime pie, nor do I even know how to make one but this dip is DEF a good replacement. I want to grab some of those graham crackers and dive right in pleeeeease.

Jill @ Kitchen Fun With My 3 Sons

Yum! This looks awesome…love key lime pie!

sue @ Cakeballs, cookies and mor

yummy I totally think fat free means you can eat as much as you want, but my pants don’t:(

Liz @ Tip Top Shape

This looks amazing!!! This gourmet food store near me used to carry a key lime pie dip like this and I was obsessed with it. Now I can make my own 😀

Living The Sweet Life

This was such a cute blog post, I went through the same feeling with trans-fat free … I was PERFECT!! And then I saw that KFC was trans-fat free … and well, that ended right there.
This dip though – – YEESSS PLLLEEAAASSEEE!

Hayley @ The Domestic Rebel
Ugggghhh. Snackwell’s. I remember when my grandma would babysit me, she stocked her pantry full of Snackwell’s and low-fat junk food like that. And her fridge was perpetually stocked with SlimFast chocolate shakes and–here’s the bad babysitting part of the story–she would let me drink them. I’m not sure how SlimFast would affect a 5-year old girl just looking for chocolate milk, but because her soaps were on and she was lazy, she’d just say “crack open that can of SlimFast and have that. It’s like chocolate milk.” Meh, I think I turned out okay. This dip is perfect. I… Read more »
Kim @ Love U Madly

Fluff now, reeses later. You’re my girl.
My sister and I made a video about how our deranged blogger minds work.. check it out!
Hope to see you at the Blogher congerence.


I just love when accidents turn into an even better idea than you thought you started out with. next time I am craving key lime pie (which is my favoritest dessert evah) I will be making this instead.

Lauren at Keep It Sweet

As a carb lover I truly wish that the fat free diet could work! Ah I miss those days full of snackwells:-)


When I first read the condensed milk part I was ready to pat you on the head all lovingly and break the news that it’s not actually fat free. But, lo and behold, there is such a thing as fat free sweetened condensed milk. You win!


Oh my goodness I have been drooling all day thinking about this dip. I love key lime and the flavors make a perfect dip. Cannot wait to try this Shelly!!


I was laughing so hard throughout this post. I remember the Snackwells rage…I always thought the devil’s food cookies tasted horrible as a kid. Ha! Now I want this key lime pie dip, gummy worms and any other fat free candy out there. 🙂 Can’t wait to try this out. Megan

Robin @ Bird On A Cake

I need this. Making it tonight!!


Just recently subscribed to your website. You are a genius girl!


That’s so cute you exhibit self-control and dip graham crackers in this delicious dip. I would just use a shovel-to-face method. I love key lime!

Alison @ Ingredients, Inc.

i have some key lime fans at my house that will love this!


Wow! This is amazing AND easy.


Dog gone it, I don’t get marshmallow fluff here. 🙁

Ashley @ Wishes and Dishes

I love key lime anything! I am making this asap…

Jen @ Jen

What a delicious mistake! And thanks for throwing in the sciencey-stuff-for-dummies. I’m seriously science illiterate.


HI-LARIOUS!! I was literally JUST saying to my friend “remember when all you had to think about was if something was fat free???” I lived on chunks of Great Harvest bread, slurpees, licorice and Rold Gold Pretzels…the good ‘ol days 🙂

This dip looks like it has passed the time barrier though and will work for all generations of “dieters” 🙂 Can’t wait to try it…I love me some Key Lime anything!!!


I’m going to grab my bathing cap and go for a DIP!!


Yum, that looks like you can make a pie from it. Although a fat free crust may be hard to come by 😛

Erin @ Dinners, Dishes, and Desserts

Hubby is going to LOVE you!! Key lime is his favorite!

Cathy @ Noble Pig

Oh my word this is one of those dangerous dips to have around, I love it!

Julie @ Table for Two

girl, my jeans hate me all the time 🙂 i would not consider this dip, i consider this a bowl that i just drink. i’m in love with anything key lime so this is totally totally awesome. i’d use a ton of graham crackers and dip dip away!

Ashton @ Something Swanky

You know what’s awful?? Those snackwell’s cookies STILL get me! I still walk by them and think, “oh, yeah, those are fat free! Why don’t I ever buy these??” And then I have to re-read the nutrition label every time to remember. 😛

LOVE this! I’m so all about sweet dips, and this looks amazingly perfect.


I make something similar from the Key Lime mix from Tastefully Simply, so I’m grateful for a recipe I can make on my own! Thanks!

luv what you do

What a fun dip. No bake dips are the best for summer!


I’m pretty sure that sounds like my dream dip. Key lime is my favorite, dip is my favorite, and I’m in love.

Kim of Mo

Girlll, I still have the ‘it’s fat free so stuff your face’ mentality. It’s definitely a mental illness. And I’m still fat, so obviously it doesn’t work like that. *sigh* I know this ‘dip’ is fabulous b/c this is how my mom always made Lemon Pie….with lemon juice instead of lime and minus the fluff, and she put meringue on top (which makes it something totally different) but my point is sweetened condensed milk plus lemon or lime juice is fantastic!

Averie @ Averie Cooks

The fat free & fat expensive – lol’ing b/c all that fatfree stuff was so expensive!

Great dip!

Ali @ Gimme Some Oven

Brilliant!!! Love the idea of this in a dip! 🙂


Um yum! And if you add a splash (or 5) of tequila it could be a margarita dip!

You know what I remember? When bagels were diet food. Good times….. A big ol’ fluffy bagel with some light cream cheese – nothing like a gazillion white flour carbs to start your day!


What a genius idea! I could see myself dipping just about everything into this.


OMG OMG I was obsessed with Snackwell’s. True story, my friend sent me a video of me in high school offering some candy to my yearbook teacher & saying it’s fat free! hahaha

this key lime pie dip looks amazing!


Ahaha. this sounds so wonderful & so was our story of fat-free.

Robin @ Simply Southern Baking

Sounds fabulous…and the perfect treat for this summer heat!


I definitely went through a fat free phase…then I remembered my undying love of peanut butter. That ended that. But I’m still all for cutting corners when I can. Love the sound of this!


That looks so yummy!


I made this just because and I’m sure glad I did. It’s delicious and creamy and all mine because my little family doesn’t like key lime anything. Thanks for such a simple yummy treat.


Just wondering where to get key lime juice ??? I looked everywhere just found regular lime juice


I made this dip today. The taste was absolutely wonderful but didn’t thicken up very well. What did I do wrong?


A little LTTP here but I followed this link from another post of yours. This sounds wonderful! And I’m totally now remembering back to the snack wells days. My mom was always dieting and would buy these, attempting to hide them. Well, it never worked – I always found and inhaled them. The devil’s food cake cookies… YuM!


Thanks for this! Mine is currently in the fridge, cooling. It’s delicious but I hope the cooling time thickens it up because it’s a little runny.