Chewy oatmeal bars layered with tart cranberries and a hint of honey, these rustic crumble bars are a cozy and wholesome treat perfect for the holiday season or a winter breakfast snack. With a balance of sweet and tart flavors and a buttery oat crumble, they are both nourishing and indulgent.

Why You’ll Love This Recipe

These cranberry oatmeal crumble bars are simple to make and packed with seasonal flavor. The soft, chewy base and topping are made with rolled oats and brown sugar, offering a delightful texture, while the cranberry filling adds a vibrant tanginess that pairs beautifully with the sweet crumble. Whether enjoyed as a breakfast, dessert, or snack, they’re a comforting homemade option that stores well and can be made ahead.

Ingredients

(Tip: You can find the complete list of ingredients and their measurements in the recipe card below.)

• rolled oats
• all-purpose flour
• light brown sugar, packed
• salt
• cinnamon
• unsalted butter, melted
• fresh or frozen cranberries
• honey (or maple syrup)
• vanilla extract
• cornstarch
• chopped walnuts (optional)

Directions

1. Preheat oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper.
2. In a large bowl, combine oats, flour, brown sugar, salt, and cinnamon. Stir until well blended.
3. Add the melted butter and mix until the mixture becomes crumbly.
4. Press two-thirds of the oat mixture into the bottom of the prepared pan. Press firmly to form an even crust.
5. In a saucepan over medium heat, combine cranberries, honey, vanilla, and cornstarch. Cook, stirring frequently, until cranberries burst and the mixture thickens, about 5–7 minutes. Allow to cool slightly.
6. Spread the cranberry mixture evenly over the crust.
7. Sprinkle the remaining oat mixture over the cranberry layer, along with chopped walnuts if using. Press lightly to help it adhere.
8. Bake for 30–35 minutes, or until the top is golden brown.
9. Let the bars cool completely in the pan before slicing for clean edges.

Servings and timing

This recipe makes approximately 12 bars.
Prep time: 15 minutes
Cook time: 35 minutes
Cooling time: 1 hour
Total time: 1 hour 50 minutes

Variations

• Mixed Berry Version: Replace cranberries with a mix of raspberries, blueberries, or blackberries.
• Nut-Free Option: Omit the walnuts for a nut-free version.
• Coconut Crumble: Add ¼ cup shredded coconut to the oat mixture for a tropical note.
• Gluten-Free: Use certified gluten-free oats and a 1:1 gluten-free flour blend.
• Vegan Option: Substitute butter with plant-based margarine and use maple syrup instead of honey.

Storage/Reheating

Store cranberry oatmeal crumble bars in an airtight container at room temperature for up to 3 days.
For longer storage, refrigerate for up to 1 week.
To freeze, wrap bars individually in parchment paper and place in a freezer-safe bag for up to 2 months. Thaw at room temperature.
These bars are best served at room temperature and do not require reheating.

FAQs

Can I use dried cranberries instead of fresh or frozen?

No, dried cranberries will not provide the same texture or moisture. Stick with fresh or frozen for best results.

Do I need to thaw frozen cranberries?

No, you can use frozen cranberries directly. They will thaw quickly during cooking.

Can I double the recipe?

Yes, simply double all ingredients and bake in a 9×13 inch pan. Adjust baking time by 5–10 minutes if needed.

Can I make these bars ahead of time?

Yes, they keep well and actually taste better the next day as the flavors meld.

Are these bars very sweet?

No, they are mildly sweet with a tart cranberry filling. You can adjust the sweetness by using more or less honey.

What’s a good substitute for cornstarch?

You can use arrowroot powder or tapioca starch in equal amounts.

Can I add orange zest for flavor?

Yes, orange zest adds a lovely brightness and pairs well with cranberries.

How do I prevent a soggy crust?

Be sure to cook the cranberry filling until thick, and press the base firmly into the pan before baking.

Can I make these bars gluten-free?

Yes, use gluten-free oats and a 1:1 gluten-free flour blend.

Do these bars travel well?

Yes, once fully cooled and sliced, they are sturdy and easy to transport for picnics or lunchboxes.

Conclusion

Cranberry oatmeal crumble bars are a wholesome, flavorful treat that strikes the perfect balance between sweet and tart. With minimal effort and pantry-friendly ingredients, they are ideal for cold mornings, cozy gatherings, or anytime you want a rustic, satisfying dessert. Whether you’re baking for the holidays or simply craving a seasonal snack, this recipe delivers comfort and taste in every bite.

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