Key Lime Pie Dip

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.

Image of Key Lime Pie Dip with Graham Crackers

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…


Image of Key Lime Juice being Added to the Bowl for Key Lime Pie Dip

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

Image of Mixing Ingredients in the Bowl for Key Lime Pie Dip

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

Image of Fluff Mixing into the Bowl for Key Lime Pie Dip

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

Image of Key Lime Pie Dip with a Graham Cracker


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Image of A Graham Cracker Dipped in Key Lime Pie Dip

Key Lime Pie Dip

  • Author: Shelly
  • 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


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!


  • 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.

Keywords: key lime pie recipe, key lime pie easy, how to make key lime pie, dessert dip, dip recipe, easy dip recipe, easy dessert recipe, easy snack recipe

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Image of Key Lime Pie Dip with a Graham Cracker

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54 comments on “Key Lime Pie Dip”

  1. 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.

  2. 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!

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

    1. I found mine at my local supermarket down the baking aisle! Otherwise I know you could order it online!

  4. 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.

  5. 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!

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