Indulge in the comforting flavors of a classic apple crisp with a delightful oat topping. This dessert combines tender, spiced apples with a crunchy, buttery oat mixture, creating a perfect balance of textures and tastes. Ideal for any occasion, this apple crisp is sure to become a favorite in your household.
Most of the ingredients for this apple crisp are common pantry staples. However, you might need to ensure you have old-fashioned oats and unsalted butter on hand. Old-fashioned oats provide a hearty texture, different from quick oats, while unsalted butter allows you to control the saltiness of the dish.

Ingredients For Apple Crisp With Oat Topping
Apples: The star of the dish, providing natural sweetness and a tender texture when baked.
Lemon juice: Adds a tangy brightness that balances the sweetness of the apples.
Granulated sugar: Sweetens the apples and helps create a caramelized effect during baking.
Ground cinnamon: Adds warmth and depth of flavor to the apple mixture.
Ground nutmeg: Enhances the spiced flavor profile with a hint of nuttiness.
Old-fashioned oats: Provides a hearty, chewy texture to the topping.
All-purpose flour: Helps bind the topping ingredients together.
Brown sugar: Adds a rich, molasses-like sweetness to the topping.
Unsalted butter: Melts into the topping, creating a crispy, golden crust.
Salt: Enhances the overall flavor by balancing the sweetness.
Technique Tip for This Recipe
To enhance the flavor and texture of your apple crisp, consider toasting the oats before mixing them with the other topping ingredients. Spread the oats on a baking sheet and toast them in a preheated oven at 350°F (175°C) for about 10 minutes, or until they are lightly golden and fragrant. This step will add a nutty depth to the crisp and make the topping even more delicious.
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Alternative Ingredients
apples - Substitute with pears: Pears have a similar texture and sweetness, making them a great alternative in fruit crisps.
lemon juice - Substitute with lime juice: Lime juice provides a similar acidity and tanginess to balance the sweetness of the fruit.
granulated sugar - Substitute with honey: Honey adds natural sweetness and a slight floral note, though it may slightly alter the texture.
ground cinnamon - Substitute with ground allspice: Allspice offers a warm, spicy flavor that complements fruit desserts well.
ground nutmeg - Substitute with ground cloves: Ground cloves provide a similar warm, spicy note, though they are slightly more pungent.
old-fashioned oats - Substitute with quick oats: Quick oats have a similar texture but may cook slightly faster, so monitor the baking time.
all-purpose flour - Substitute with whole wheat flour: Whole wheat flour adds a nutty flavor and more fiber, though it may make the topping denser.
brown sugar - Substitute with coconut sugar: Coconut sugar has a similar caramel-like flavor and can be used in equal amounts.
unsalted butter - Substitute with coconut oil: Coconut oil provides a similar fat content and can add a subtle coconut flavor.
salt - Substitute with sea salt: Sea salt has a similar flavor profile and can be used in the same quantity.
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How To Store / Freeze This Dish
Allow the apple crisp to cool completely at room temperature before storing. This helps to prevent condensation, which can make the topping soggy.
Transfer the cooled apple crisp to an airtight container. If you don't have a container large enough, you can cover the baking dish tightly with plastic wrap or aluminum foil.
Store the apple crisp in the refrigerator for up to 5 days. The cool temperature will help maintain the freshness of the apples and the crispness of the oat topping.
For longer storage, you can freeze the apple crisp. First, wrap the entire baking dish tightly with plastic wrap, then cover it with aluminum foil to prevent freezer burn.
Alternatively, you can portion out the apple crisp into individual servings and store them in freezer-safe containers or resealable plastic bags. This makes it easier to reheat only what you need.
Label the containers with the date so you can keep track of how long they've been stored. The apple crisp can be frozen for up to 3 months.
When you're ready to enjoy the frozen apple crisp, thaw it in the refrigerator overnight. This slow thawing process helps maintain the texture of the apples and the oat topping.
To reheat, preheat your oven to 350°F (175°C). Place the apple crisp in an oven-safe dish and cover it with aluminum foil to prevent the topping from burning. Heat for about 20 minutes or until warmed through.
For a quicker option, you can reheat individual portions in the microwave. Place a serving on a microwave-safe plate and heat on medium power for 1-2 minutes, checking frequently to avoid overheating.
If you prefer a crispier topping after reheating, you can place the apple crisp under the broiler for a few minutes. Keep a close eye on it to prevent burning.
How To Reheat Leftovers
Preheat your oven to 350°F (175°C). Place the leftover apple crisp in an oven-safe dish. Cover it with aluminum foil to prevent the oat topping from burning. Heat for about 15-20 minutes or until warmed through. Remove the foil for the last 5 minutes to re-crisp the topping.
For a quicker option, use the microwave. Place a portion of the apple crisp in a microwave-safe bowl. Heat on medium power for 1-2 minutes. Check to see if it's heated through. If not, continue heating in 30-second intervals. Note that the oat topping may not stay as crispy.
If you have an air fryer, preheat it to 350°F (175°C). Place the apple crisp in an air fryer-safe dish. Heat for about 5-7 minutes, checking halfway through to ensure the oat topping doesn't overcook. This method helps maintain the crispiness of the topping.
On the stovetop, use a skillet over medium heat. Add a small amount of butter to the pan. Place the apple crisp in the skillet and cover with a lid. Heat for about 5-10 minutes, stirring occasionally to ensure even heating. This method can help re-crisp the oat topping while warming the apples.
For a toaster oven, preheat to 350°F (175°C). Place the apple crisp in an oven-safe dish. Heat for about 10-15 minutes, checking to ensure the oat topping doesn't burn. This method is great for smaller portions.
Best Tools for This Recipe
Oven: Used to bake the apple crisp at a consistent temperature of 350°F (175°C).
Mixing bowl: Essential for combining the sliced apples with lemon juice, granulated sugar, cinnamon, and nutmeg.
Baking dish: Holds the apple mixture and oat topping while baking.
Peeler: Handy for peeling the apples efficiently.
Apple corer: Makes coring the apples quick and easy.
Knife: Necessary for slicing the apples into even pieces.
Cutting board: Provides a stable surface for peeling, coring, and slicing the apples.
Measuring cups: Ensures accurate measurement of ingredients like granulated sugar, oats, flour, and brown sugar.
Measuring spoons: Used to measure small quantities of ingredients like lemon juice, cinnamon, nutmeg, and salt.
Wooden spoon: Useful for mixing the apple mixture and the oat topping.
Spatula: Helps in spreading the oat mixture evenly over the apples.
Oven mitts: Protects your hands when placing the baking dish in the oven and removing it once baked.
Cooling rack: Allows the apple crisp to cool slightly before serving.
How to Save Time on Making This Recipe
Pre-prep the apples: Peel, core, and slice the apples in advance and store them in lemon water to prevent browning.
Use a food processor: Quickly mix the oat topping ingredients by pulsing them in a food processor.
Pre-measure ingredients: Measure out the sugar, spices, and flour ahead of time to streamline the process.
Melt butter in microwave: Save time by melting the butter in the microwave instead of on the stove.
Batch cooking: Double the recipe and freeze half for a quick dessert later.

Apple Crisp with Oat Topping
Ingredients
Filling
- 6 apples, peeled, cored, and sliced
- 2 tablespoon lemon juice
- ½ cup granulated sugar
- ½ teaspoon ground cinnamon
- ¼ teaspoon ground nutmeg
Topping
- 1 cup old-fashioned oats
- ½ cup all-purpose flour
- ½ cup brown sugar
- ½ cup unsalted butter, melted
- ¼ teaspoon salt
Instructions
- Preheat your oven to 350°F (175°C).
- In a large mixing bowl, combine the sliced apples and lemon juice.
- Add granulated sugar, cinnamon, and nutmeg to the apples. Mix well.
- Transfer the apple mixture to a baking dish.
- In another bowl, combine oats, flour, brown sugar, melted butter, and salt.
- Sprinkle the oat mixture evenly over the apples.
- Bake for 45 minutes or until the topping is golden brown and the apples are tender.
- Let it cool slightly before serving. Enjoy!
Nutritional Value
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