Best Healthy Oat Crumble Topping For Any Warm Baked Filing

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Total Time:
25 minutes mins

Yields:
2 cups
Recipe

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As a health coach and recipe developer, I created this healthy oat crumble topping to deliver a crunchy, nutty texture with fewer sugar. Perfect as a healthy crumble topping with oats for yogurt, oatmeal toppings, smoothie bowls, or baked fruit desserts. The crunchy, nutty, cinnamon-spiked crumble mix is the perfect complement to any warm baked filling – easy, wholesome, and quick to prepare. Gluten-free & dairy-free options included.

Baked oat crumble topping (without fruit) – which can be used as granola.
Table of Contents

Why You’ll Love This Recipe

Wholesome Ingredients: rolled oats provide fiber and satisfying crunch.
Low-Sugar Option: maple sugar or coconut sugar replaces refined sugar.
Easy to Make: ready in under 25 minutes with simple ingredients.
Make-Ahead Friendly: perfect for meal prep, refrigerate or freeze for later.
Universal: it can be used in many ways and many recipes like:

Mixed ingredients for the best crumble topping with oats.

Print Recipe

Healthy Oat Crumble Topping

This easy healthy oat crumble topping recipe delivers a crunchy streusel made with rolled oats, maple sugar, and nuts. Perfect as a healthy oat crumble topping for yogurt, oatmeal toppings, smoothie bowls, fruit crisps, cobblers, and pies—learn how to make oat crumble topping quickly and enjoy a healthier-sugar, high-fiber dessert.

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Prep Time
5 minutes mins
Cook Time
20 minutes mins
Total Time
25 minutes mins
Course:
Dessert
Cuisine:
All, Clean Eating
Servings:
2 cups
Calories:
876kcal
Author:
Olga Caz
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Ingredients 1x 2x 3x

¾ cup rolled oats – use gluten free if you need
⅓ cup flour – for gluten free see notes
½ cup crushed walnuts – optional, but recommended
6 tbsp butter – for dairy free see notes
⅓ cup maple sugar – or brown sugar, or coconut sugar

Spices

½ tsp cinnamon
¼ tsp nutmeg
¼ tsp cardamom – optional but recommended
¼ tsp sea salt – if the butter is unsalted

Instructions

Step 1. Prepare the ingredients and rub butter into flour first.

Place you butter in the freezer for at least 1 hour before starting. Then, if you’re doing it by hand, use a grater: in a bowl, rub the frozen butter against the smaller grating surface on a box grater. Toss the frozen shreds of butter with flour until all pieces are coated. If you have a food processor: add the cold butter and the flour to the bowl of a food processor and pulse the mixture until you have a chunky / crumb like mixture.

Step 2. Combine all the ingredients and mix:

To the butter and flour mixture, add the spices, sugar, crushed walnuts and rolled oats, mix by hand or with a spatula until combined. Now you could freeze it for future use as it is, or bake the same day on a pie, or separate.

Step 3. Bake the oat crumb topping:

Transfer the mixture to a baking tray or cookie sheet, use your fingers to sprinkle evenly. Bake at 360°F for 17-20 minutes total (if you’re using regular flour) and 8-12 minutes more if you’re using gluten free flour (it usually browns slower).

Step 4. Cool and serve:

Once it’s crisp and golden remove from oven and let it cool. Serve cold or room temperature. See notes for tips.

Notes

For a clustered crumb: bake the whole time without stirring. To make a crispier oat crumb topping that’s more granular and dispersed, remove from oven half the baking time, stir, then return to oven and bake until golden. This is great when you intend to serve it separate as a dessert topping and not incorporated in a pie or cake.

Make It Dairy Free: use a dairy free butter like – Miyoko’s (it has similar texture as regular butter when frozen) and is healthier than Earth Balance brand.
Make It Gluten Free: use gluten free flours like – gluten free oat flour, almond flour, arrowroot flour (similar to potato flour), buckwheat flour, sorghum flour or rice flour. For best results use a mix of a starchy flour and whole grain flour.
Freezing: For longer storage is best to freeze the crumble topping unbaked. Freeze for up to 3 months, in an airtight container or bag. You can top a pie right away while still frozen.
If you already cooked the oat crumb but then you want to top a pie with it, it’s best to cover the pan with foil while baking to prevent burning.

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Nutrition

The information shown is an estimate provided by an online nutrition calculator.

Ingredients You’ll Need

Rolled oats – regular or gluten-free (essential for oat crumble topping texture). Rolled oats are the best (not steel cut or quick oats) whether you use regular or gluten free.
Flour – all-purpose, whole grain, or gluten-free options (see variations). Whether I use regular flour (for guests) or a 50/50 mix of white and whole grain, or gluten free flour (1 type or a gluten free flour mix) it provides the same crunchy delicious result.
Cold Butter or Coconut Oil – creates a crisp and crunchy crumble. Use vegan butter or coconut oil to keep this oat crumble topping – vegan & dairy free
Maple Sugar or Coconut Sugar – a healthier alternative to brown sugar.
Walnuts (optional) – add extra crunch and nutritional benefits.
Spices – cinnamon, nutmeg, cardamom, and salt for enhanced flavor.

Find the complete printable recipe with measurements below in the recipe card.

Ingredients needed for making this oat crumble topping.

How to Make Oat Crumble Topping: Step-by-Step Instructions

Step 1: Prepare Butter and Flour

Freeze butter at least 1 hour in advance.
Then, if you’re doing it by hand, use a grater: in a bowl, rub the frozen butter against the smaller grating surface on a box grater. Toss the frozen shreds of butter with flour until all pieces are coated.
If you have a food processor: add the cold butter and the flour to the bowl of a food processor and pulse the mixture until you have a chunky / crumb like mixture. See picture below.

Step 1:
Mix cold butter into the flour by using the pulse function of a food processor.

Step 2: Combine Ingredients

To the butter and flour mixture, add the spices, sugar, crushed walnuts and rolled oats, mix by hand or with a spatula until evenly combined. Now you could freeze the oat crumble topping for future use as it is, or bake the same day on a pie, or separate. See picture below:

Step 2:
Mix all ingredients until combined.

Step 3: Bake the Crumble

Spread evenly on a baking tray.
Bake the oat crumble topping at 360°F for 17-20 minutes total (if you’re using regular flour) and 8-12 minutes more if you’re using gluten free flour (it usually browns slower).

Step 3:
Baking the crumble topping on a baking sheet.

Step 4: Cool and Serve

Allow topping to cool completely for maximum crispness.
Serve immediately or store for future use.

Step 4.
Baked oat crumble with a sandy texture, to be used as granola topping.

Healthier Variations

Dairy-Free: Substitute butter with coconut oil or vegan butter.
Gluten-Free: Use gluten-free whole-grain flour blends, almond flour, or oat flour.
Sugar-Conscious: Reduce sweeteners by half or add more spices for extra flavor.

How Do You Use The Oat Crumble Topping?

Bake separately as a crunchy snack, granola replacement or topping for banana pudding.
Top fruit crisps, cobblers, pies, or desserts before baking.
Sprinkle unbaked oat crumble topping on top of a banana bread batter before baking.
Scatter (unbaked) over the surface of a cake, like this cinnamon walnut coffee cake.
Use the oat topping for crumble apple pie, cobbler or as streusel topping for an apple crepe cake.
Sprinkle over yogurt, oatmeal, or breakfast smoothie bowls.

Ways to eat:
Baked apples topped with oat crumble (left). Coconut yogurt and oat crumble topping (right).

I usually use this oat crumble topping for crisps and crumble recipes. Just sprinkle this oat crumble on any fruit you prepared for baking.

Baked fruit with oat crumble topping.

Coach’s Tip for Perfect Clusters Or Sandy Texture

If you prefer a clustered oat crumble topping then bake the whole time without stirring. To make a crispier oat crumb topping that’s more granular and dispersed, remove from oven half the baking time, stir, then return to oven and bake until golden. This is great when you intend to serve it separate as a dessert topping and not incorporated in a pie or cake.
If you prefer a finer oat crumb texture then you can chop the rolled oats along with walnuts in a food processor before mixing all other ingredients.

If you prefer a clumpy oat crumble topping (instead of a sandy texture) then after mixing everything, let it sit at room temperature for 5-8 minutes ant then use your hand to clutch and squash the mixture. The heat from your hand will help create lumps (see pic below).

Storing Suggestions

Storing leftovers: if already baked, keep at room temperature for up to 3 days, if you want to prepare the oat streusel topping in advance (unbaked) and store, then keep it in the fridge for up to 3 days before baking.
Freezing: For longer storage is best to freeze the crumble topping unbaked. Freeze for up to 3 months, in an airtight container or bag. You can top a pie while still frozen and bake it right away. Baking with frozen crumble topping will yield a crunchier texture.

Substitutions & Tips

Add ins: flaked coconut, dried fruits, crushed pecans or sliced almonds (or seeds if allergic to nuts).
Use fresh / or frozen fruits: berries, apple, mango, pear, plum or peach under the crumb topping.
Make It Dairy Free: use a dairy free butter like – Miyoko’s (it has similar texture as regular butter when frozen) and is healthier than Earth Balance brand.
Make It Gluten Free: use gluten free flours like – gluten free oat flour, almond flour, arrowroot flour (similar to potato flour), buckwheat flour, sorghum flour or rice flour. For best results use a mix of a starchy flour and whole grain flour.

Recipe FAQs

How thick should crumble topping be?

Ideally about 2 cm thick (0.57 inch), ensures even baking and crunch.

Should crumble topping be added before or after baking?

Always add crumble topping before baking crisps or pies. If used separately, bake first for crunchy granola.

What is the difference between crumble and streusel?

They are the same thing, it depends how you use it. For example the streusel is more often incorporated into shortbread-like baked goods, but the crumble is more often used as topping to baked fruits, pies or crisps.

How do I make my crumble topping crisp?

To make the oat crumple topping scrip and crunchy you need to use cold fat (frozen butter is the best). Another option is to mix all dry ingredients and at the end to drizzle melted butter (or oil), then mix again with your hands until everything is evenly coated. Both options work well.

Why is my crumble topping soggy?

It’s either because the filling you baked the crumble with has too much liquid (avoid overly wet fruit fillings) or because the temperature wasn’t high enough or because you used the wrong proportions.

More Healthy Dessert Recipes To Try

Blackberry And Apple Crumble Recipe

Easy Peach Crumble With Oats (Healthy Peach Crisp)

Easy Healthy Strawberry Crisp Recipe (Fresh or Frozen Berries)

Apple And Blueberry Crumble Recipe

Have you made this healthy oat crumble topping? Leave a comment or rating below. Your feedback helps me improve and create more wholesome recipes!

Enjoy your healthy oat crumble!

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