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 layer, making it the perfect treat for any occasion. Whether you're serving it warm with a scoop of vanilla ice cream or enjoying it on its own, this apple crisp is sure to become a favorite.
Most of the ingredients for this apple crisp are common pantry staples, but you may need to pick up a few items if they aren't already in your kitchen. Rolled oats are essential for the topping and provide a wonderful texture. Make sure to use unsalted butter to control the saltiness of the dish. If you don't have ground cinnamon, it's a must for adding that warm, spiced flavor to the apples.

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 touch of acidity to balance the sweetness and prevent the apples from browning.
Granulated sugar: Sweetens the apples and helps create a syrupy consistency as they bake.
Ground cinnamon: Infuses the apples with a warm, spiced flavor that complements their natural sweetness.
Rolled oats: Forms the base of the crunchy topping, adding texture and a nutty flavor.
All-purpose flour: Helps bind the topping ingredients together and adds structure.
Brown sugar: Adds sweetness and a hint of molasses flavor to the topping.
Unsalted butter: Provides richness and helps create a crumbly, golden topping.
Technique Tip for This Recipe
To achieve a perfectly balanced apple crisp, ensure that the apple slices are uniform in thickness. This promotes even cooking and prevents some pieces from becoming mushy while others remain undercooked. Additionally, when mixing the oat topping, use your fingers to create a crumbly texture, which will result in a delightful, crunchy finish.
Suggested Side Dishes
Alternative Ingredients
apples - Substitute with pears: Pears have a similar texture and sweetness when baked, making them a great alternative.
lemon juice - Substitute with lime juice: Lime juice provides a similar acidity and freshness to balance the sweetness of the fruit.
granulated sugar - Substitute with coconut sugar: Coconut sugar has a lower glycemic index and adds a slight caramel flavor.
ground cinnamon - Substitute with pumpkin pie spice: Pumpkin pie spice includes cinnamon along with other complementary spices like nutmeg and cloves.
rolled oats - Substitute with quinoa flakes: Quinoa flakes provide a similar texture and are a good gluten-free option.
all-purpose flour - Substitute with almond flour: Almond flour is gluten-free and adds a nutty flavor to the topping.
brown sugar - Substitute with maple syrup: Maple syrup adds a rich, natural sweetness and a hint of maple flavor.
unsalted butter - Substitute with coconut oil: Coconut oil provides a similar fat content and adds a subtle coconut flavor.
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How to Store or Freeze This Dessert
Allow the apple crisp to cool completely at room temperature before storing. This helps prevent condensation, which can make the topping soggy.
For short-term storage, cover the baking dish tightly with plastic wrap or aluminum foil. Alternatively, transfer the apple crisp to an airtight container. Store in the refrigerator for up to 5 days.
To reheat, preheat your oven to 350°F (175°C). Place the apple crisp in an oven-safe dish and cover with aluminum foil to prevent the topping from burning. Heat for about 15-20 minutes or until warmed through. For a crispier topping, remove the foil during the last 5 minutes of reheating.
For freezing, first ensure the apple crisp is completely cooled. Transfer it to a freezer-safe container or wrap the entire baking dish tightly with plastic wrap and then aluminum foil. Label with the date and freeze for up to 3 months.
When ready to enjoy, thaw the apple crisp in the refrigerator overnight. Reheat in the oven at 350°F (175°C) for about 20-25 minutes, or until heated through and the topping is crisp.
For individual servings, you can also freeze portions in smaller containers. This makes it easy to reheat just the amount you need.
If you prefer a microwave option, place a portion of the apple crisp in a microwave-safe dish. Heat on medium power for 1-2 minutes, checking frequently to avoid overheating. Note that the topping may not be as crisp as when reheated in the oven.
To maintain the best texture and flavor, avoid storing the apple crisp at room temperature for more than a few hours. Always refrigerate or freeze promptly to ensure freshness.
How to Reheat Leftovers
Oven Method: 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 the apples are warmed through and the topping is crispy again.
Microwave Method: Transfer a portion of the apple crisp to a microwave-safe dish. Heat on medium power for 1-2 minutes, checking halfway through to ensure it heats evenly. Be cautious, as the oat topping may not stay as crispy as when reheated in the oven.
Stovetop Method: Place the apple crisp in a skillet over medium-low heat. Cover the skillet with a lid to help retain moisture and heat evenly. Stir occasionally to prevent sticking and ensure even heating. This method can help maintain some of the crispiness of the oat topping.
Air Fryer Method: Preheat your air fryer to 350°F (175°C). Place the apple crisp in an air fryer-safe dish. Heat for about 5-7 minutes, checking frequently to avoid over-browning. This method can help restore the crispiness of the oat topping effectively.
Best Tools for This Recipe
Oven: Used to bake the apple crisp at a consistent temperature of 350°F (175°C).
Mixing bowl: Needed to combine the sliced apples with lemon juice, granulated sugar, and ground cinnamon.
Baking dish: Used to transfer the apple mixture and bake the crisp.
Mixing bowl: Another bowl to mix the rolled oats, flour, brown sugar, and melted butter.
Peeler: Essential for peeling the apples.
Apple corer: Useful for removing the cores from the apples.
Knife: Needed to slice the apples.
Measuring cups: Required to measure the ingredients accurately.
Measuring spoons: Used to measure smaller quantities like lemon juice and ground cinnamon.
Spatula: Handy for mixing the oat topping until crumbly.
Oven mitts: Important for safely handling the hot baking dish.
Cooling rack: Allows the apple crisp to cool slightly before serving.
How to Save Time on Making This Recipe
Prepare the filling: Slice and coat the apples the night before and store them in the fridge to save time.
Use pre-mixed spices: Instead of measuring out cinnamon, use a pre-mixed apple pie spice blend.
Melt butter in microwave: Quickly melt the butter in the microwave to speed up the process.
Pre-measure dry ingredients: Measure out the oats, flour, and brown sugar ahead of time and store them in a sealed container.
Use a food processor: Use a food processor to quickly combine the oat topping ingredients.

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
Topping
- 1 cup rolled oats
- ½ cup all-purpose flour
- ½ cup brown sugar
- ½ cup unsalted butter, melted
Instructions
- Preheat your oven to 350°F (175°C).
- In a mixing bowl, combine the sliced apples, lemon juice, granulated sugar, and ground cinnamon. Toss to coat the apples evenly.
- Transfer the apple mixture to a baking dish.
- In another bowl, mix the rolled oats, flour, brown sugar, and melted butter until crumbly.
- Sprinkle the oat mixture evenly over the apples.
- Bake in the preheated oven for 45 minutes, or until the topping is golden brown and the apples are tender.
- Let cool slightly before serving. Enjoy!
Nutritional Value
Keywords
Suggested Appetizers and Main Courses for This Recipe
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