This 3-ingredient Key Lime Pie Dip recipe is the easiest way to enjoy the tasty flavors of key lime pie! This quick and easy dessert dip is the perfect fat-free treat for summer!

Easy Key Lime Pie Dip Recipe
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.

This is basically the easiest dessert ever.
How to Make Key Lime Pie Dip
All it takes is 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…

The 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.

Key Lime Pie Dip
- Prep Time: 5 minutes
- Cook Time: 0 minutes
- Total Time: 1 hour 5 minutes
- Yield: 4 servings 1x
- Category: Dessert
- Method: No Bake
- Cuisine: American
Description
This 3-ingredient Key Lime Pie Dip recipe is the easiest way to enjoy the tasty flavors of key lime pie! This quick and easy dessert dip is the perfect fat-free treat for summer!
Ingredients
- 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
Instructions
- In a medium bowl whisk together the sweetened condensed milk and key lime juice until thickened, approx 30 seconds.
- Add in the Fluff and continue stirring until incorporated.
- Chill for at least an hour.
- Serve chilled with graham crackers and/or fruit
Notes
full fat sweetened condensed milk can be used in place of fat free.
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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 want my face in it.
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!
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 😀
yummy I totally think fat free means you can eat as much as you want, but my pants don’t:(
Yum! This looks awesome…love key lime pie!
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.
Oh my goodness this is such a great dip!
I bet this would be great as a pie with some fat free cool whip on top!!!
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!!
This looks like the perfect summertime dip! Great to bring to a party!