Easy Crumble Recipe with Oats | Quick & Crunchy
This easy crumble recipe is one of my favorite ways to add something crunchy to yogurt, fruit, breakfast bowls, or desserts. It is made with rolled oats, soy flakes, almonds, a little protein powder, and maple syrup for a simple homemade crumble that turns golden and crisp in just about 15 minutes.
You can make it in the air fryer or bake it in the oven, and once it cools you get those little crunchy oat clusters that are so good on anything creamy or fruity.
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An Easy Homemade Crumble Topping
I love a good crumble, especially when you get those slightly bigger crunchy pieces mixed with smaller crispy oat crumbs.
But you do not always need to make an entire fruit crumble to enjoy the best part. A full crumble means preparing the fruit, making the topping, assembling everything, and waiting for the whole dish to bake. Sometimes I just want the crunchy topping.
That is why I started making the crumble separately. Instead of baking it on top of apples, berries, or another moist filling, the crumble is baked on its own until golden and crisp. Then I can keep a batch ready and use as much as I need.
Warm apple compote, a spoonful of Greek yogurt, and some of this crunchy crumble on top? That is basically dessert done.
It also makes meal prep much easier because the dry crumble stays separate from anything that could make it soft. Once completely cooled, I store it in an airtight container and use it within about one to two weeks.
Crumble vs Granola: What Is the Difference?
Crumble and granola can look pretty similar when both contain oats and nuts, but they are not quite the same thing.
A classic crumble topping is usually based on flour, butter, and sugar. Oats and nuts are often added for more texture. Granola, on the other hand, usually starts with oats and is baked with ingredients such as nuts, seeds, sweetener, and oil or another fat.
This recipe sits somewhere in between. The rolled oats, soy flakes, and almonds give it some of that crunchy granola texture, while the flour helps create the smaller crumbs and larger clusters I want from a crumble topping.
I also use this recipe more like a crumble than a breakfast cereal. A little goes over yogurt, fruit, oatmeal, or dessert whenever I want extra crunch.
Why You Will Love This Easy Crumble Recipe
- Ready in about 15 minutes: Perfect when you want a quick homemade topping without baking a full dessert.
- Simple ingredients: Everything is made with ingredients you may already have in your pantry.
- Crunchy oat texture: Rolled oats, soy flakes, and almonds create a mix of crispy crumbs and larger clusters.
- Naturally sweetened: Maple syrup adds sweetness and helps the crumble turn golden as it bakes.
- Air fryer or oven: You can use whichever method is easier for you.
- Easy to customize: Change the nuts, flour, protein powder, or spices depending on what you already have at home.
- Perfect for meal prep: Make a batch and keep it ready for yogurt bowls, fruit, oatmeal, or quick desserts.
Ingredients You Need
You will find the exact measurements in the recipe card below. There are only a few ingredients, but each one adds something different to the finished crumble.
Rolled oats: These create the main base of the oat crumble topping. I prefer rolled oats because they keep more texture after baking and help create those slightly larger crunchy pieces.
Soy flakes: I like adding soy flakes because they make the crumble a little more interesting and add some extra protein. They also become wonderfully crisp once baked.
Almonds: Chopped almonds add another layer of crunch and a slightly nutty flavor. Keep some pieces a little larger instead of chopping them completely fine.
Protein powder: I use pea protein powder. You only need a small amount, so the crumble still tastes like oats and maple rather than protein powder.
Whole wheat flour or oat flour: A little flour helps bind the ingredients and gives the topping more of that classic crumbly texture. Whole wheat flour adds a slightly nuttier flavor, while oat flour keeps the oat flavor more noticeable.
Maple syrup: This sweetens the crumble and helps the oat mixture turn golden and slightly caramelized while baking.
Low fat butter or nut butter: You only need a tablespoon. Butter gives the crumble a more classic flavor, while almond or peanut butter adds a stronger nutty taste.
What Makes a Good Crumble Topping?
For me, the best crumble topping needs a mix of textures. You want small crispy crumbs, but you also want some larger clusters that stay together when you sprinkle them over yogurt or fruit.
The combination of oats, flour, maple syrup, and a small amount of fat helps with exactly that. The dry ingredients give the crumble structure, while the maple syrup and butter or nut butter help everything stick together.
And if you love the bigger pieces, do not break the mixture apart too much before baking. Gently pressing a few sections together gives you those chunky clusters once everything has cooled.
How to Make This Easy Crumble Recipe
Start by adding the soy flakes, rolled oats, chopped almonds, protein powder, and whole wheat flour or oat flour to a bowl.
Stir everything together so the protein powder and flour are evenly distributed through the oats.
Add the maple syrup and low fat butter or nut butter. Mix until all of the dry ingredients are evenly coated and the mixture starts forming small clusters.
Gently press a few sections together if you want some larger crumble pieces.
Spread the mixture onto parchment paper in your air fryer basket or onto a parchment lined baking sheet. Lightly press it into a fairly even layer, but do not break apart all of the larger pieces.
Bake at 320°F (160°C) for about 15 minutes. About halfway through, carefully lift the parchment paper with the crumble on top, turn the crumble over, gently peel away the parchment paper, and return it to the air fryer or oven for the remaining cooking time.
If you are using a baking sheet and flipping the whole layer feels awkward, you can simply turn the larger pieces gently with a spatula instead.
Once the crumble looks lightly golden, remove it and let it cool completely. This part is important because it becomes noticeably crunchier as it cools.
Air Fryer Crumble
The air fryer is my favorite option when I only want to make a quick batch. There is no need to preheat a full oven, and the circulating hot air helps the oat crumble become crisp quickly.
Spread the mixture in a parchment lined air fryer basket and cook it at 320°F (160°C) for around 15 minutes. Check it halfway through because air fryers can vary quite a bit.
If the almonds or smaller oat pieces are already becoming dark, take the crumble out a little earlier. It does not need to feel completely crisp while it is still hot.
How to Make Crumble in the Oven
No air fryer? The oven works just as well.
Spread the crumble mixture over a parchment lined baking sheet and bake at 320°F (160°C) for around 15 minutes. Turn the crumble after about 7 to 8 minutes, then continue baking until lightly golden.
Keep in mind that the crumble does not need to feel completely crisp while it is still hot. It will firm up more as it cools.
Tips for the Best Crunchy Oat Crumble
Do not make the pieces too small. Press a few sections of the mixture together before baking if you like larger crunchy crumble clusters.
Turn it halfway through. The edges and smaller pieces can brown more quickly, especially in an air fryer, so gently turning the crumble helps it cook more evenly.
Watch the final few minutes. Oats and almonds can go from golden to too dark fairly quickly.
Let it cool completely. Fresh from the air fryer or oven, the crumble may still feel a little soft. Once cool, it becomes much crunchier.
Check the mixture before baking. It should be moist enough to form little clusters when you press it together. If it still feels very dry, add a small additional drizzle of maple syrup.
Use rolled oats for more texture. Quick oats can work, but they create a finer crumble with fewer large pieces.
Easy Crumble Recipe with Oats
Ingredients
- 2 tbsp soy flakes
- ½ cup rolled oats (40 g)
- 3 tbsp chopped almonds (about 24 g)
- 1 tbsp pea protein powder
- 2 tbsp whole wheat flour or oat flour
- ¼ cup maple syrup (60 ml)
- 1 tbsp low fat butter or nut butter
Method
- Add the soy flakes, rolled oats, chopped almonds, protein powder, and whole wheat flour or oat flour to a medium bowl. Stir until evenly combined.
- Add the maple syrup and low fat butter or nut butter. Mix until all of the dry ingredients are coated and the mixture starts to form small crumble clusters.
- Keep a few larger pieces instead of breaking the mixture completely apart. This gives the finished crumble more texture.
- Spread the mixture in an even layer in a lined air fryer basket or on a parchment lined baking sheet.
- Air fry or bake at 320°F (160°C) for about 15 minutes.
- Stir the crumble once halfway through cooking so it browns evenly.
- Remove it once the oats and almonds are lightly golden. Let the crumble cool completely before serving. It will become crunchier as it cools.
Notes
Calories: 180 kcal
Carbohydrates: 25 g
Protein: 7 g
Fat: 7 g
Fiber: 3 g
How to Use This Easy Crumble Recipe
This is probably my favorite part about making the crumble separately. You do not have to decide on one specific dessert before you make it.
Once you have a batch of crunchy oat crumble ready, you can add a little whenever breakfast or dessert needs more texture.
- Sprinkle it over Greek yogurt or Skyr.
- Add it to applesauce and fresh apple.
- Serve it over warm baked apples or pears.
- Use it as a crunchy topping for smoothie bowls.
- Add it to oatmeal or overnight oats.
- Serve it with berries and yogurt for a quick dessert.
- Sprinkle it over ice cream or frozen yogurt.
If you like crunchy breakfast toppings, you can also try my homemade air fryer granola.
Easy Fruit Crumble Without Making a Full Recipe
You can also turn this topping into a really easy individual fruit crumble.
Warm some chopped apple, berries, peaches, pears, or plums until the fruit becomes soft and juicy. Spoon it into a small bowl and add the finished crumble on top.
I especially like it with warm apple compote and a little Greek yogurt. You get the warm fruit, something creamy, and the crunchy topping without baking an entire dish.
Because the oat crumble is already baked and crisp, there is no need to put the entire dessert back into the oven. It is perfect when you only want one serving.
Which Fruit Goes Best with Crumble?
Almost any fruit that becomes soft and juicy when heated works with a crumble topping.
Apples: Probably the most classic option. Add cinnamon before heating them for a simple apple crumble flavor.
Berries: Blueberries, raspberries, strawberries, and blackberries all work beautifully. Frozen berries are also convenient when fresh berries are out of season.
Peaches: Soft, juicy peaches are especially good with the slightly nutty oat topping.
Pears: Pears become naturally sweet and soft once heated and pair really well with cinnamon and almonds.
Plums: Their slightly tart flavor gives you a nice contrast with the sweet maple crumble.
Easy Crumble Recipe Variations
The basic recipe is easy to change depending on what you already have in your pantry.
Cinnamon crumble: Add about ½ teaspoon of cinnamon to the dry ingredients before mixing.
Apple pie version: Combine cinnamon with a small pinch of nutmeg for a warmer fall flavor.
Almond crumble: Use almond butter instead of low fat butter and add a few extra chopped almonds.
Peanut butter crumble: Replace the butter with peanut butter for a richer and slightly saltier topping.
Oat flour version: Use oat flour instead of whole wheat flour if you want the oat flavor to stand out more.
Without protein powder: Simply leave it out. If the mixture seems too wet afterward, add a little more oat flour or whole wheat flour.
Extra protein version: You can experiment with slightly more protein powder, but add it gradually. Too much can make the crumble dry instead of crisp.
How to Store Homemade Crumble
Let the crumble cool completely before storing it. If you put warm crumble into a closed container, trapped steam can make the oats soften.
Once cool, transfer it to an airtight container and keep it in a cool, dry place at room temperature. For the best texture, I like to use it within about one to two weeks.
This is also why the recipe works so well for meal prep. Keep the crumble separate from yogurt, fruit, or applesauce until you are ready to eat it so it stays crunchy instead of soaking up moisture.
If the crumble eventually becomes a little soft, spread it out again and warm it briefly in the air fryer or oven at 320°F (160°C). Watch it closely because it has already been baked once. Let it cool completely again before putting it back into the container.
Frequently Asked Questions
What is crumble topping made from?
Traditional crumble topping usually combines flour, sugar, and butter. This version uses rolled oats, soy flakes, almonds, flour, maple syrup, and a small amount of butter or nut butter for a crunchy oat based variation.
How do I know when the crumble is ready?
The oats and almonds should look lightly golden. Do not wait until the crumble feels completely hard because it becomes crispier as it cools.
Why is my crumble not crunchy?
It may simply still be warm. Let the crumble cool completely first. If it remains soft, spread it out and bake or air fry it for a few additional minutes, watching it closely.
Can I make this crumble without butter?
Yes. Use almond butter, peanut butter, or another nut or seed butter instead. Keep in mind that this will also change the flavor slightly.
Can I make the crumble without nuts?
Yes. Leave out the almonds and replace them with a little more rolled oats or soy flakes. If you are also using nut butter, replace it with low fat butter or a suitable seed butter.
Can I use quick oats?
Yes, but the texture will be different. Quick oats are smaller and absorb the maple syrup more quickly, so the finished topping usually has finer crumbs and fewer large crunchy clusters.
Can I use this crumble on apples?
Absolutely. Warm diced or sliced apples with a little cinnamon until soft, then sprinkle the finished crumble over the top. Add a little Greek yogurt or Skyr if you want something creamy with it.
Can I use frozen berries?
Yes. Heat the frozen berries separately until warm and juicy, then add the already baked crumble right before serving so it stays crisp.
Can I double the recipe?
Yes. Double all of the ingredients, but make sure the crumble still has enough room to spread out. If your air fryer basket is small, cook it in two batches so it can brown evenly.
More Easy Breakfast and Dessert Ideas
If you like recipes that add something crunchy to an easy breakfast or dessert, try one of these next:
Final Thoughts
This easy crumble recipe is such a simple way to make yogurt, fruit, oatmeal, or dessert a little more exciting. Rolled oats, soy flakes, almonds, and maple syrup bake into crunchy golden clusters without needing a long ingredient list or making an entire fruit crumble.
Make it in the air fryer when you want something quick or use the oven for a larger batch. Once it has cooled, keep it ready in an airtight container and you have an easy homemade crumble topping whenever breakfast or dessert needs some extra crunch.
