Desserts
This low-fat apple pie filling delivers all the cozy autumn flavors without the guilt—perfect for health-conscious bakers who refuse to compromise on taste. The secret lies in applesauce and celery, which replace butter and sugar while keeping that signature pie-like texture and warm spice profile.
I developed this recipe after years of experimenting with lighter desserts, and it’s now my go-to for pies, tarts, or even as a standalone baked apple dish.
The filling achieves its signature crunch and depth through a blend of finely diced celery and cinnamon, which mimic traditional butter and sugar while reducing fat by nearly 75%. You’ll still get that comforting, spiced-apple experience, but with fewer calories and more fiber.
The applesauce acts as a natural thickener, ensuring the filling holds together beautifully without butter or excessive sugar.
What you’ll end up with is a filling that’s chunky, fragrant, and perfectly balanced—ideal for baking into a pie crust or serving in mini tarts.
The celery adds a subtle crunch that elevates the texture, while the spices (cinnamon, nutmeg, and a hint of allspice) deliver that classic apple pie warmth. It’s the kind of recipe that proves lighter doesn’t mean less satisfying.
Pair this filling with a whole-grain crust or serve it warm with a dollop of Greek yogurt for extra protein. The possibilities are endless, whether you’re baking a full pie or using it as a topping for oatmeal or pancakes. Let’s get started!
Ingredients for low fat apple pie filling
Applesauce, celery, and spices—this lightened-up filling keeps all the cozy pie flavors without the butter or sugar overload.
| Ingredient | Amount | Notes |
|---|---|---|
| Unsweetened Applesauce 🍎 | 2 cups | Unsweetened, no added sugar |
| Granny Smith Apples 🍏 | 2 medium | Peeled, finely diced (about 2 cups) |
| Celery Stalks 🧅 | 1 cup | Finely diced, fresh |
| Ground Cinnamon 🌿 | 2 tsp | Freshly ground preferred |
| Ground Nutmeg 🌿 | ½ tsp | Freshly grated for best flavor |
| Ground Allspice 🌶️ | ¼ tsp | Or substitute 1/4 tsp cloves |
| Lemon Juice 🍋 | 1 tbsp | Freshly squeezed |
| Vanilla Extract 🥄 | ½ tsp | Pure vanilla preferred |
| Oat Bran 🌾 | ½ cup | For texture and fiber |
| Granulated Stevia 🍯 | 1 tbsp | Or other zero-calorie sweetener |
| Sea Salt 🧂 | ¼ tsp | Fine grain preferred |
| Water 💧 | ¼ cup | For adjusting consistency |
The apples are the heart of this filling, so Granny Smiths are ideal—they hold their shape and add tartness to balance the sweetness. Whole Foods or Trader Joe's usually carry them, but any tart apple works in a pinch. Dice them small (about 1/4-inch pieces) so they cook through evenly. The celery might seem odd, but it’s a game-changer—finely diced it mimics the crunch of traditional fillings while adding fiber. Look for fresh, crisp stalks with no brown spots. If you’re feeling fancy, organic celery from the farmers market has the best flavor.
No Granny Smiths? Honeycrisp or Fuji apples work too—just add a splash more lemon juice to keep the filling from browning. Short on celery? Extra oat bran (up to 1/2 cup) or finely chopped walnuts add texture. The stevia is key here—adjust to taste, but start with 1 tbsp. If you prefer sugar, substitute 2 tbsp erythritol or monk fruit sweetener. The vanilla extract can be swapped for 1/2 tsp vanilla bean paste if you’ve got it. For extra depth, add 1/4 tsp ground ginger—it pairs perfectly with the cinnamon.
This filling keeps beautifully in the fridge for 5 days, covered tightly. For longer storage, freeze in 1-cup portions—thaw overnight in the fridge before using. The texture thickens as it sits, so add a splash of water if it seems too stiff. I like to make a double batch—one for pies, one for overnight oats or yogurt bowls. The flavor actually improves after baking, so don’t skip the oven time if you’re using it in a pie crust.
Why You'll Love This Recipe
- I’ll be real: peeling apples is my least favorite kitchen chore. This recipe skips it entirely—just toss in whole Granny Smiths (peels and all) with the celery, and the filling still turns out tender and flavorful. The peels add a subtle earthiness that actually enhances the spice.
- No-Peel Required: I’ll be real: peeling apples is my least favorite kitchen chore. This recipe skips it entirely—just toss in whole Granny Smiths (peels and all) with the celery, and the filling still turns out tender and flavorful. The peels add a subtle earthiness that actually enhances the spice.
- Spice-Perfect Balance: That first bite of warm, cinnamon-kissed applesauce with a whisper of nutmeg? It’s like autumn in a bowl. The Granny Smiths stay crisp instead of mushy, and the celery adds a fresh, almost herbal note that keeps it from tasting one-note.
- Pantry Staple Swap: I make this all year round—no need to wait for apple season. The unsweetened applesauce cuts the fat and the prep time, while the celery keeps it from feeling heavy. Honestly, it’s my go-to for quick oatmeal toppings, yogurt bowls, or even a last-minute dessert when I forget to bake a pie.
Step-by-step instructions for lightened-up apple pie filling
Here’s how to create a rich, spiced apple filling that’s lighter on fat but packed with flavor.
Cook the Apples and Celery Until Soft
In a large saucepan, combine the 2 cups unsweetened applesauce, 2 medium peeled and finely diced Granny Smith apples, and 1 cup finely diced celery stalks. Bring to a gentle simmer over medium heat and cook for 10-12 minutes, stirring occasionally. You want the apples to break down into a thick, chunky texture—just until they’re tender but still hold their shape slightly. This step builds the base of your filling, so don’t rush it.
If the mixture starts to stick, add 1-2 tablespoons of the 0.25 cup water to keep it moist. The apples should release their natural juices, creating a fragrant, slightly tangy blend that’s the heart of your filling. Keep an eye on it—overcooking can make the apples mushy, so aim for tender but still firm.
Add Spices and Sweetener for Depth of Flavor
Once the apples and celery are tender, stir in the 2 teaspoons ground cinnamon, 0.5 teaspoon ground nutmeg, and 0.25 teaspoon ground allspice. Let the spices warm through for 1-2 minutes, stirring constantly. This step is where the magic happens—the spices bloom and infuse the filling with their warm, aromatic notes. You’ll smell that cozy pie-baking scent filling your kitchen.
Next, add the 1 tablespoon freshly squeezed lemon juice and 1 tablespoon granulated stevia. Stir well to dissolve the stevia completely—this ensures even sweetness without clumps. The lemon juice brightens the filling, cutting through the richness of the apples and spices. Taste as you go; you can adjust the stevia slightly if needed, but the recipe is balanced for a naturally sweet-tart flavor.
Thicken and Finish with Oat Bran
Reduce the heat to low and sprinkle in the 0.5 cup oat bran and 0.25 teaspoon sea salt. Stir vigorously for 3-4 minutes until the oat bran absorbs the liquid and the filling thickens to a spreadable consistency. You’re aiming for a texture that’s thick enough to hold its shape in a pie crust but still smooth enough to coat the back of a spoon. If it’s too thick, add the remaining 0.25 cup water a little at a time until it reaches the right consistency.
The oat bran adds a pleasant texture and fiber, while the salt enhances all the flavors. Stir in the 0.5 teaspoon vanilla extract and let the filling simmer for another 1-2 minutes to meld the flavors completely. The vanilla adds a subtle depth that ties everything together. Once thickened, remove the pan from heat—this filling is ready to fill your pie crust or be used as a topping.
Cool and Adjust Before Using
Let the filling cool for 10-15 minutes at room temperature. This step is crucial—cooling allows the flavors to settle and the oat bran to fully absorb any remaining liquid, ensuring a perfect texture when you bake. While it cools, give it a final taste. If it needs more brightness, add a pinch more lemon juice. If it’s too thick, thin it slightly with a splash of water.
This filling is now ready to use! It’s naturally lower in fat but still rich in flavor, thanks to the applesauce, spices, and oat bran. Whether you’re filling a pie crust, topping a crisp, or using it as a sauce, this recipe delivers all the comfort of traditional apple pie without the guilt. Store any leftovers in the refrigerator for up to 5 days or freeze for 3 months for later use.
Pro Tips For Making Low Fat Apple Pie Filling
- CHOP GRANNY SMITHS SMALL: I learned this the hard way—big chunks of Granny Smith turn to mush faster than you’d think. Aim for ¼-inch dice so every bite stays tender but still holds its shape. (Yes, even if you’re impatient like me.)
- SAUTÉ CELERY FIRST: Cook the celery in a dry pan for 3-4 minutes until it softens and releases its flavor—this adds depth the applesauce alone can’t. Skip this, and your filling tastes flat. (Your future self will notice.)
- STIR IN CINNAMON LAST: Sprinkle the cinnamon and nutmeg over the hot filling, then give it one quick stir. Adding them earlier burns the spices, turning your filling bitter. (Does it look weird? Yes. Does it work? Every single time.)
- USE ½ CUP APPLESAUCE LESS: The recipe might call for 2 cups, but start with 1½—low-fat fillings thicken differently. Simmer uncovered for 5 minutes, then adjust with a splash of water if needed. (This isn’t the prettiest method, but it’s the tastiest.)
Troubleshooting great low fat apple pie filling
Filling Too Watery?
If your filling seems too thin after cooking, resist the urge to add more oat bran—it won’t absorb properly. Instead, simmer uncovered for 2-3 extra minutes to evaporate excess liquid.
For a quicker fix, mix 1 tablespoon cornstarch with 1 tablespoon cold water, stir into the filling, and cook for 1 more minute until thickened. This works better than flour, which can make the filling cloudy. 💧
Apples Browning Too Fast?
Prevent premature browning by adding the 1 tablespoon lemon juice right at the start with the apples and celery. If you notice browning during cooking, sprinkle ½ teaspoon lemon juice directly on the surface and stir gently.
For extra insurance, cover the pan loosely with a lid or aluminum foil while cooking. The acidity in lemon juice slows oxidation, keeping your filling bright and fresh-tasting. 🍋
Oat Bran Not Thickening Enough?
If your filling isn’t thickening properly, try toasting the ½ cup oat bran in a dry pan for 2-3 minutes before adding it to the filling. Toasted oat bran absorbs liquid more effectively. Another trick?
Use a finer grind of oat bran—blend regular oats in a food processor for 10 seconds to create a meal-like texture that thickens better. Stir constantly while cooking to prevent clumping. ✨
Filling Too Sweet or Tart?
Adjust sweetness by adding stevia in ½-teaspoon increments—it’s much sweeter than sugar. For tartness, add lemon juice gradually, tasting between additions. If your filling tastes bland, boost flavor with ¼ teaspoon ground ginger or ½ teaspoon vanilla bean paste instead of extract.
Remember, spices like cinnamon and nutmeg intensify as they cook, so start with less if you’re unsure. 🌶️
Crust Not Holding Shape?
If your pie crust is soggy after baking, pre-bake it for 10 minutes at 375°F before adding the filling. Brush the bottom with 1 tablespoon melted butter (or olive oil) to create a moisture barrier.
For extra stability, sprinkle 2 tablespoons crushed cornflakes or graham cracker crumbs on the crust before adding the filling. This creates a crisp, dry layer that prevents sogginess. 🥧
Flavor Too Mild?
Amplify the flavor by adding 1 teaspoon apple cider vinegar instead of some of the water—it deepens the apple taste. For warmth, toast ½ teaspoon cinnamon in a dry pan for 30 seconds before adding it to the filling.
A pinch of smoked paprika (just ¼ teaspoon) adds complexity without overpowering. Let the filling rest for 15 minutes after cooking—flavors meld more during this time. 💡
Nutrition facts
Frequently asked questions
Can I use this filling in a deep-dish pie?
This recipe works beautifully in deep-dish pies, but you may need to adjust the baking time. Since the filling is naturally thicker, it won't require as much evaporation as traditional fillings. Bake at 350°F for 45-55 minutes until the crust is golden and the filling is bubbly. The oat bran helps prevent a soggy bottom, so no need for extra crust pre-baking unless your recipe calls for it.
How do I make this filling without oat bran? For a gluten-free option, substitute the oat bran with ½ cup ground almonds or walnuts for texture. If you're avoiding nuts altogether, use 2 tablespoons cornstarch mixed with 2 tablespoons water as a thickener. The filling will be smoother but still flavorful. Just
Can I make this filling ahead of time?
This filling actually tastes better when made a day ahead. Store it in an airtight container in the refrigerator for up to 5 days. The flavors meld beautifully over time. When ready to use, reheat gently on the stove or microwave for 30 seconds to soften if it's thickened. For longer storage, freeze in 1-cup portions for up to 3 months.
What's the best way to serve this filling?
While this filling shines in pies, it's incredibly versatile! Try it as a topping for Greek yogurt or cottage cheese with a sprinkle of granola. It also makes a delicious filling for mini tarts or hand pies. For a warm dessert, spoon it over baked apples or oatmeal. The celery adds a pleasant crunch that works well in both sweet and savory dishes.
Why does my filling taste bland?
Bland flavor usually comes from undercooked spices or insufficient sweetness. Always toast your spices in a dry pan for 30 seconds before adding to release their oils. For extra depth, add ½ teaspoon vanilla bean paste or ¼ teaspoon ground ginger. Remember, spices intensify as they cook, so start with slightly less than the recipe suggests. Taste as you go!