This low fat key lime pie is a creamy, tangy dessert that delivers all the tropical zing without the usual heavy cream or full-fat condensed milk. Thanks to fat-free Greek yogurt and light cream cheese, each slice comes in at just 4 grams of fat—making it a refreshing, guilt-free treat that still feels indulgent. It’s high in flavor, lower in calories, and perfect for summer gatherings, healthy dessert tables, or whenever you’re craving something sweet and citrusy.
About This Recipe
Each bite of this pie is smooth and silky, with a bright key lime punch and just the right amount of sweetness. The light graham cracker crust gives a lovely crunch that contrasts with the soft filling.
This pie is incredibly easy to make with a no-bake filling that sets up beautifully in the fridge. It’s ideal for make-ahead desserts, potlucks, or anytime you want to impress guests with a secretly healthy treat.
Why This Recipe Belongs in Your Diet
Fat-free Greek yogurt adds protein and tang while replacing heavy cream. Light cream cheese cuts saturated fat dramatically while keeping the filling rich and satisfying. Paired with a reduced-fat crust, this pie offers all the flavor of the classic with a smart nutritional profile.
What You’ll Need (Ingredients)
We’re combining fresh citrus with light dairy and a simple crust for a pie that’s bright, creamy, and refreshingly low in fat.
- Reduced-Fat Graham Cracker Crust (1 pre-made 9-inch crust): Saves time and cuts fat compared to traditional buttery crusts.
- Fat-Free Greek Yogurt (1 cup): Adds tang and protein, keeps the filling light and smooth.
- Light Cream Cheese (8 ounces, softened): Gives the pie richness without all the fat.
- Fresh Lime Zest (1 teaspoon): Adds real citrus aroma and brightness.
- Fresh Lime Juice or Key Lime Juice (1/3 cup): Provides that signature tart flavor.
- Sweetened Condensed Skim Milk (1 can, 14 ounces): Lightens the traditional base while still delivering sweetness and creaminess.
- Vanilla Extract (1 teaspoon): Enhances the flavor and smooths out the tanginess.
How to Make Low Fat Key Lime Pie
- Blend filling: In a large bowl, use a hand mixer to blend cream cheese until smooth.
- Add yogurt and condensed milk: Mix in Greek yogurt and sweetened condensed milk until fully combined.
- Add lime juice and zest: Stir in the lime juice, zest, and vanilla extract.
- Pour into crust: Spread the filling evenly into the graham cracker crust.
- Chill for at least 4 hours, or overnight, until fully set.
- Garnish with lime slices or zest just before serving.

Recipe Tips and Variations
- For extra lime punch, add a few drops of lime extract to the filling.
- Make it gluten-free with a GF graham crust.
- Add a dollop of fat-free whipped topping for extra flair.
- Want a firmer texture? Mix in 1 teaspoon of unflavored gelatin dissolved in hot water.
How to Store Leftovers
Keep the pie refrigerated in its pie pan, covered with plastic wrap or a lid, for up to 5 days. You can also freeze slices individually, then thaw in the fridge for a cool, refreshing treat.
Nutrition Facts
- Serving Size: 1 slice (1/8 of pie)
- Calories: 210 kcal
- Fat: 4 g
- Carbohydrates: 34 g
- Protein: 6 g
- Sodium: 180 mg

Low Fat Key Lime Pie
Description
Creamy, zesty, and only 4 grams of fat per slice—this lightened-up pie is a summer favorite made guilt-free.
Ingredients
Instructions
- Beat cream cheese until smooth.
- Add yogurt and condensed milk, mixing well.
- Stir in lime juice, zest, and vanilla.
- Pour into crust and smooth top.
- Chill for at least 4 hours.
- Garnish with lime slices or zest before serving.