Desserts
This low fat apple pie filling recipe delivers all the cozy comfort of classic apple pie without the guilt—crisp celery adds texture while applesauce and egg whites keep it light.
The secret lies in balancing natural sweetness with minimal fat, creating a filling that stays tender yet holds its shape when baked. I developed this version after years of experimenting with healthier pie fillings that still taste indulgent.
What makes this filling special is the celery crunch—finely diced celery adds a satisfying texture without adding significant calories, while applesauce replaces butter for moisture and binding. A touch of lemon juice brightens the apples, and cornstarch creates that perfect thick, spoonable consistency without heavy syrup.
The filling cooks down to a thick, flavorful base that's ready to pour into your favorite crust.
By the time you're done, you'll have a filling that's rich in apple flavor but light enough to enjoy without regret. The celery adds a subtle crunch that contrasts beautifully with the tender apples, and the subtle sweetness from the applesauce keeps it balanced.
This filling works perfectly with a lattice crust, a simple double crust, or even as a topping for oatmeal or yogurt for a lighter dessert option.
Pair it with a whole wheat crust for extra fiber or a pre-baked crust to save time. The filling can be made ahead and refrigerated for up to 24 hours, making it perfect for stress-free baking.
Let's get started on creating a pie that's as good for you as it is delicious.
Ingredients for low fat apple pie filling
Here's what you need to make this light, flavorful filling that tastes indulgent but stays healthy.
| Ingredient | Amount | Notes |
|---|---|---|
| Granny Smith Apples 🍎 | 4 medium | Peeled, cored, finely diced |
| Celery Stalks 🥬 | 2 medium | Finely diced, crisp |
| Unsweetened Applesauce 🍏 | ½ cup | Unsweetened, for moisture |
| Large Egg Whites 🥚 | 3 whole | Room temperature preferred |
| Cornstarch 🌾 | ¼ cup | For thickening consistency |
| Granulated Sugar 🍚 | ½ cup | Adjust to taste |
| Lemon Juice 🍋 | 1 tbsp | Freshly squeezed |
| Ground Cinnamon 🌿 | 1 tsp | Freshly ground preferred |
| Vanilla Extract 🍦 | ½ tsp | Pure vanilla preferred |
| Salt 🧂 | ¼ tsp | Fine sea salt |
| Ground Nutmeg 🌿 | ¼ tsp | Freshly grated |
| Extra-Virgin Olive Oil 🫒 | 1 tsp | For crisping apples |
The apples are the star—Granny Smiths bring that bright, tart flavor that balances perfectly. Buy organic if possible since the skin has nutrients, but peel them anyway for that classic pie texture. Celery adds crunch without calories, and Trader Joe's or Whole Foods usually have the freshest stalks. I always grab extra apples—half go into the filling, half get tossed into oatmeal. The applesauce is non-negotiable here—it replaces butter for moisture while keeping the filling light. Mott's unsweetened is my go-to, but any plain applesauce works.
No applesauce? Unsweetened applesauce from a can (like those little squeeze packs) works in a pinch. Short on egg whites? Flax eggs (1 tbsp flax + 3 tbsp water = 1 egg) keep it vegan, though texture will differ slightly. The cornstarch is key for that perfect thick consistency—don't skip it. For extra sweetness, swap half the sugar for maple syrup or honey. The celery can be prepped ahead and stored in the fridge for 3-4 days—just keep it dry to avoid sogginess. Apples brown fast, so toss them with a splash of lemon juice while you prep everything else.
This filling keeps beautifully in the fridge for up to 24 hours before baking—perfect for stress-free pie days. Portion it into containers for easy reheating or topping for yogurt. If you're making it ahead, cover with plastic wrap pressed directly on the surface to prevent drying. The filling reheats well in the microwave (30-second bursts) or oven (350°F for 10-15 minutes). Freeze portions for up to 3 months—just thaw overnight in the fridge before using.
Why You'll Love This Recipe
- No Chopping Hassle: I swear by this recipe—just core those Granny Smiths and rough-chop the celery. The applesauce does half the work for you, so no one’s stuck peeling or dicing for hours.
- Tart-Sweet Magic: That tangy Granny Smith punch? It’s chef’s kiss—especially when the egg whites whip the filling into a silky, thick texture that’s not too sweet, not too bland. Honestly, it’s the kind of balance that makes you reach for seconds.
- Pie or No Pie: Use it straight in a crust, dump it into yogurt for a protein boost, or spoon it over oatmeal. The cornstarch keeps it stable enough to reheat or freeze, so it’s my go-to for lazy breakfasts or last-minute desserts.
- Budget-Friendly Staples: Applesauce and celery stretch this filling far—way cheaper than pre-made versions. And since it keeps for days in the fridge or freezes perfectly, I’m always stocked without breaking the bank. (Yes, even on a Tuesday night.)
Step-by-step instructions for celery-infused apple filling
Here's how to create a light, fluffy filling with celery crunch that won't weigh down your pie crust.
Cook the Apple-Celery Base
In a medium saucepan, combine the 4 medium Granny Smith Apples, 2 medium Celery Stalks, 0.5 cup Unsweetened Applesauce, 1 tsp Extra-Virgin Olive Oil, 0.5 cup Granulated Sugar, 1 tbsp Lemon Juice, 1 tsp Ground Cinnamon, 0.25 tsp Ground Nutmeg, and 0.25 tsp Salt. Stir gently to coat the apples and celery evenly.
Place the saucepan over medium heat and bring to a gentle simmer. Let it cook uncovered for 10-12 minutes, stirring occasionally, until the apples soften but still retain some texture. You'll know it's ready when the mixture thickens slightly and the apples break down just enough to release their juices. The celery should stay crisp—this is key for that satisfying crunch in every bite.
Thicken the Filling Mixture
While the apple-celery mixture cooks, whisk together the 3 whole Large Egg Whites, 0.5 tsp Vanilla Extract, and 0.25 cup Cornstarch in a separate bowl until smooth and fully combined. This step is crucial for creating that signature pie filling texture without heavy cream or butter.
Once the apple mixture has thickened, reduce the heat to low and slowly pour in the egg white mixture while stirring constantly. The heat will cause the cornstarch to activate, creating a silky, custard-like consistency. Continue cooking for 3-5 minutes until the filling thickens to a pudding-like texture that coats the back of a spoon. If it thickens too quickly, add 1-2 tablespoons of water to adjust the consistency.
Cool and Prepare for Baking
Remove the saucepan from heat and let the filling cool for 10 minutes at room temperature. This cooling step is essential—it prevents the egg whites from scrambling when you add them to your pie crust later. Stir occasionally to distribute any settled ingredients evenly.
Here's a pro tip: If you're using a pre-baked crust, pour the cooled filling directly into it. For unbaked crusts, I recommend assembling the pie immediately after cooling to maintain the best texture. The filling should be thick but still pourable—like a cross between applesauce and pudding. If it's too thick, whisk in a splash of water or apple juice to loosen it slightly.
Final Adjustments Before Baking
Taste the filling and adjust the sweetness if needed. You might want to add a bit more Granulated Sugar or a splash of Lemon Juice to balance the flavors. The celery should add a subtle, refreshing crunch that contrasts beautifully with the tender apples.
For best results, use this filling within 24 hours of making it. The egg whites keep it light and fluffy, but they do start to set up over time. If you're not baking immediately, store the filling in an airtight container in the refrigerator. When ready to bake, let it sit at room temperature for 30 minutes before pouring into your crust to ensure even distribution.
Pro Tips For Making Low Fat Apple Pie Filling
- Peel Apples Thoroughly: Granny Smiths have thick skins that won’t soften properly—take the time to peel them completely, even if it feels tedious. I used to leave patches, and the filling stayed unpleasantly crisp in spots. A vegetable peeler works fastest here, but don’t rush the edges.
- Pre-Cook Celery: Sauté the celery stalks in a dry pan for 3–4 minutes until just softened before adding to the filling. This prevents them from turning to mush later and adds a subtle depth that raw celery can’t match. Yes, it’s an extra step, but it’s worth it.
- Whisk Egg Whites Cold: Chill your egg whites in the fridge for 10 minutes before whipping—room temperature makes them gummy. I learned this after a filling turned gluey; cold whites hold their structure better and create that perfect lift. Beat them to stiff peaks, then fold gently into the mixture.
- Thicken Gradually: Stir the cornstarch into the applesauce and prepped apples before adding to the pot, then cook on medium-low heat. High heat burns the starch before it activates, leaving you with a watery mess. Keep the temperature steady and stir every 2 minutes once it thickens.
Regional styles of this low fat apple pie filling
Classic New England
In New England, apple pie fillings often embrace tart Granny Smith apples for that signature bright flavor. Locals here add a pinch of allspice to the filling, which pairs beautifully with the celery crunch.
I like to use 1/4 tsp allspice along with the cinnamon and nutmeg for that cozy, spiced aroma. Serve with a flaky, lard-based crust—it's a regional favorite that adds richness without extra fat. 🍏
Southern Comfort Style
Southern apple pie fillings lean into warmth and sweetness, often using a mix of tart and sweet apples like McIntosh and Braeburn. I swap half the Granny Smiths for 2 cups diced McIntosh apples to balance the tartness.
Add a splash of bourbon (1 tsp) to the filling while cooking for depth, and top with a lattice crust. The celery adds a refreshing contrast to the caramelized apples. 🥃
Pacific Northwest Twist
Out west, apple pie fillings often incorporate local ingredients like Honeycrisp apples and blackberries. For this filling, I stir in 1/2 cup blackberry jam during the final cooking stage to add a fruity tang.
The region's love for fresh, bright flavors makes this a lighter, fruit-forward version. Pair with a whole wheat crust for extra fiber. 🌿
Midwest Heartland
The Midwest keeps apple pie filling hearty with caramelized onions and extra cinnamon. I sauté 1 cup thinly sliced yellow onions in olive oil until golden before adding to the filling.
This adds natural sweetness and texture without extra fat. A deep-dish crust is traditional here—it holds the filling perfectly. 🧅
Modern Health-Conscious
For a contemporary take, reduce sugar by 1/4 cup and use unsweetened applesauce as the primary thickener. Add 1 tsp chia seeds for omega-3s and fiber.
This version works well as a topping for Greek yogurt or overnight oats. The celery crunch remains a star, keeping it satisfying while lighter. 💪
Nutrition facts
Frequently asked questions
Can I use regular applesauce instead of unsweetened?
Regular applesauce contains added sugar, which will make your filling much sweeter than intended. For best results, stick with unsweetened applesauce to maintain the balanced flavor profile. If you must use sweetened, reduce the granulated sugar by 2 tablespoons to compensate.
Why does my filling look too thin after cooking?
The most common reason is undercooking the cornstarch mixture. Keep stirring and cook for 1-2 extra minutes until it thickens properly. If it's still too thin, mix 1 teaspoon cornstarch with 1 tablespoon cold water, stir into the filling, and cook for another 30 seconds.
Can I make this filling ahead of time?
Yes! This filling keeps well in an airtight container in the fridge for up to 24 hours before baking. For longer storage, freeze portions for 3 months. Thaw overnight in the fridge before using. The egg whites help preserve texture, but the filling works best when used within 24 hours for optimal fluffiness.
What's the best crust to pair with this light filling?
A whole wheat crust or pre-baked lattice crust works beautifully with this light filling. The lattice allows steam to escape while keeping the filling tender, and whole wheat adds fiber without heaviness. Avoid overly buttery crusts—they'll overpower the delicate flavors of this low-fat version.
Can I substitute egg whites for something else?
For a vegan version, replace egg whites with 3 tablespoons ground flaxseed mixed with 9 tablespoons water (let sit for 5 minutes to thicken). The texture will be slightly denser, but still workable. For egg-free binding, blend 1 ripe banana until smooth and use 2 tablespoons of the puree per egg white.