Mango Oatmeal Crumble Bars

A Tropical Treat with a Cozy Twist

The moment the warm scent of mangoes and oats fills the kitchen, it transports me straight back to long summer afternoons spent at my grandmother’s farmhouse. She had a knack for turning the simplest ingredients into magic, and one of her seasonal favorites was mango preserves tucked into crumbly oat bars. These Mango Oatmeal Crumble Bars are a modern tribute to that memory—an easy, comforting dessert that tastes like sunshine wrapped in a hug.

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With their golden, buttery crumble and vibrant mango filling, these bars strike the perfect balance between chewy and crisp. Whether enjoyed with a morning cup of tea, packed into a picnic basket, or served warm with a scoop of vanilla ice cream, they capture the essence of summer and the joy of home baking. What’s more, they’re made from pantry staples—no fancy tools or techniques needed, just a little patience and love.

Perfect for any time of year but especially delightful during mango season, these bars bring together tropical flavors and wholesome oats in the most irresistible way.

Pin it now and inspire more food lovers on Pinterest!

Why You’ll Love This Recipe:

  • Easy to Make: No mixer, no fuss. Just basic steps and simple ingredients.
  • Versatile: Works with fresh or frozen mangoes or even mango jam.
  • Perfect Texture: Buttery, crumbly topping meets jammy, fruity filling.
  • Make-Ahead Friendly: Stores beautifully and travels well.

INGREDIENTS YOU’LL NEED:

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  • 1/2 cup (1 stick) unsalted butter, melted
  • 1 cup all-purpose flour
  • 1 cup old-fashioned oats
  • 2/3 cup light brown sugar, packed
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon ground cinnamon
  • Pinch of salt
  • 1 1/2 cups diced mango (fresh or thawed from frozen)
  • 1 tablespoon lemon juice
  • 1 tablespoon cornstarch
  • 1/4 cup granulated sugar

HOW TO MAKE MANGO OATMEAL CRUMBLE BARS:

A Step-by-Step Guide to the Perfect Mango Oatmeal Crumble Bars

Step 1: Preheat and Prep
Start by preheating your oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper or lightly grease it for easy removal later.

Step 2: Mix the Crumble Base
In a medium bowl, combine the melted butter, flour, oats, brown sugar, baking soda, cinnamon, and a pinch of salt. Stir until the mixture is crumbly and well combined.

Step 3: Press and Bake the Bottom Layer
Reserve about 3/4 cup of the oat mixture for the topping. Press the rest firmly into the prepared pan to form an even base. Bake for 10 minutes while you prepare the filling.

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Step 4: Make the Mango Filling
In a small saucepan, combine the diced mango, lemon juice, cornstarch, and granulated sugar. Cook over medium heat, stirring often, until the mixture thickens—about 5 to 7 minutes. It should resemble a loose jam.

Step 5: Assemble the Bars
Spread the mango filling evenly over the baked crust. Crumble the reserved oat mixture over the top.

Step 6: Bake Until Golden
Return the pan to the oven and bake for another 20–25 minutes, or until the top is golden brown and crisp.

Step 7: Cool and Slice
Let the bars cool completely in the pan before slicing into squares. For cleaner cuts, you can chill them for 30 minutes before slicing.

HELPFUL TIPS:

  • Fresh vs. Frozen: Both fresh and frozen mangoes work well. Just make sure to thaw and drain frozen mangoes before using.
  • Jam Shortcut: In a pinch, use about 3/4 cup mango jam instead of cooking the fruit filling.
  • Add Texture: A sprinkle of shredded coconut or chopped nuts in the crumble adds even more flavor.
  • Double the Batch: This recipe easily doubles for a 9×13-inch pan if you’re baking for a crowd.
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DETAILS:

  • Prep Time: 15 minutes
  • Cook Time: 35 minutes
  • Total Time: 50 minutes
  • Yield: 9–12 bars
  • Category: Dessert
  • Method: Baking
  • Cuisine: American, Tropical
  • Diet: Vegetarian

NOTES:

These Mango Oatmeal Crumble Bars are best enjoyed at room temperature or slightly warmed. Store them in an airtight container to keep the oat topping crisp.

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NUTRITIONAL INFORMATION (Per Bar – Approximate):

  • Calories: 210
  • Fat: 8g
  • Carbohydrates: 32g
  • Sugar: 17g
  • Protein: 2g
  • Fiber: 2g

FREQUENTLY ASKED QUESTIONS:

Can I use canned mangoes?
Yes, just be sure to drain them well and dice them into small chunks.

How long do these bars keep?
Stored in an airtight container, they’ll keep for up to 5 days at room temperature or up to 1 week in the fridge.

Can I freeze them?
Absolutely! Freeze in a single layer or with parchment between layers for up to 2 months.

STORAGE INSTRUCTIONS:

Once cooled, store bars in an airtight container at room temperature for up to 5 days. For longer storage, refrigerate or freeze as needed. Let frozen bars come to room temperature before serving.

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Related Recipes:

If you liked this recipe, you’ll definitely enjoy these other fruity and buttery bars:

CONCLUSION:

Baking these Mango Oatmeal Crumble Bars is more than just making a dessert—it’s creating a moment of comfort and warmth. Whether you’re sharing them with loved ones or savoring one alone with a cup of tea, they bring a taste of sunshine and nostalgia into your kitchen. They’re the kind of treat that makes you pause, smile, and maybe reach for a second square.

Print
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Mango Oatmeal Crumble Bars


  • Author: Charlotte B.

Description

The moment the warm scent of mangoes and oats fills the kitchen, it transports me straight back to long summer afternoons spent at my grandmother’s farmhouse. She had a knack for turning the simplest ingredients into magic, and one of her seasonal favorites was mango preserves tucked into crumbly oat bars. These Mango Oatmeal Crumble Bars are a modern tribute to that memory—an easy, comforting dessert that tastes like sunshine wrapped in a hug.

With their golden, buttery crumble and vibrant mango filling, these bars strike the perfect balance between chewy and crisp. Whether enjoyed with a morning cup of tea, packed into a picnic basket, or served warm with a scoop of vanilla ice cream, they capture the essence of summer and the joy of home baking. What’s more, they’re made from pantry staples—no fancy tools or techniques needed, just a little patience and love.

 

Perfect for any time of year but especially delightful during mango season, these bars bring together tropical flavors and wholesome oats in the most irresistible way.


Ingredients

Scale
  • 1/2 cup (1 stick) unsalted butter, melted
  • 1 cup all-purpose flour
  • 1 cup old-fashioned oats
  • 2/3 cup light brown sugar, packed
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon ground cinnamon
  • Pinch of salt
  • 1 1/2 cups diced mango (fresh or thawed from frozen)
  • 1 tablespoon lemon juice
  • 1 tablespoon cornstarch
  • 1/4 cup granulated sugar

Instructions

Step 1: Preheat and Prep
Start by preheating your oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper or lightly grease it for easy removal later.

Step 2: Mix the Crumble Base
In a medium bowl, combine the melted butter, flour, oats, brown sugar, baking soda, cinnamon, and a pinch of salt. Stir until the mixture is crumbly and well combined.

Step 3: Press and Bake the Bottom Layer
Reserve about 3/4 cup of the oat mixture for the topping. Press the rest firmly into the prepared pan to form an even base. Bake for 10 minutes while you prepare the filling.

Step 4: Make the Mango Filling
In a small saucepan, combine the diced mango, lemon juice, cornstarch, and granulated sugar. Cook over medium heat, stirring often, until the mixture thickens—about 5 to 7 minutes. It should resemble a loose jam.

Step 5: Assemble the Bars
Spread the mango filling evenly over the baked crust. Crumble the reserved oat mixture over the top.

Step 6: Bake Until Golden
Return the pan to the oven and bake for another 20–25 minutes, or until the top is golden brown and crisp.

 

Step 7: Cool and Slice
Let the bars cool completely in the pan before slicing into squares. For cleaner cuts, you can chill them for 30 minutes before slicing.

Notes

These Mango Oatmeal Crumble Bars are best enjoyed at room temperature or slightly warmed. Store them in an airtight container to keep the oat topping crisp.

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