As Easy As Apple Pie

Raspberry Oatmeal Crumble Bars

These Raspberry Oatmeal Crumble Bars are filled with a delicious raspberry jam and topped with a buttery, crumbly oat topping!

You don’t need any fancy ingredients or equipment to make these. They’re easy to throw together and if you need to plan ahead these bars are even freezer friendly!

Raspberry Oatmeal Crumb Bars - A simple, one bowl recipe that takes just minutes to prepare. They make a great dessert, snack, or even breakfast!

Raspberry crumble bars recipe

These Raspberry oatmeal bars are the best! Sweet, soft, buttery, and delicious. They are easy to throw together and make a great summer dessert, picnic snack, or breakfast on-the-go!

Just 10 minutes of prep time and one bowl. The dough you make for the crust doubles as the crumb topping.

And as we are using jam instead of fresh raspberries, you can make these fruit bars recipe year-round! 🙌🏻

Ingredients & substitution suggestions

To make these raspberry oatmeal bars, you will only need a few ingredients you probably already have on hand.

  • Flour – You’ll want to use all-purpose flour.
  • Oats – Rolled oats (old-fashioned oats) work best in these bars as they are thicker and give a nice chewy texture. Quick oats or instant oats will change the consistency of the bars, so these types won’t work as substitutions.
  • Sugar – I used a mix of brown and white sugar for a deeper flavor and chew.
  • Salt – It makes all the flavors pop.
  • Unsalted butter – Rather than using cold butter and rubbing it together with the flour mixture, we are using melted butter in this recipe. It’s quicker, easier, and it gives me a crunchier crumble.
  • Vanilla –  It infuses a light vanilla flavor.
  • Raspberry jam – You can use a good quality store-bought jam or make your own. I prefer to use seedless raspberry jam. If using cold jam, warm it up in the microwave for 30 seconds before spreading it on.

How to make raspberry oatmeal bars

  • Crust/crumble – Start by making the crust which is just a mixture of flour, old-fashioned rolled oats, granulated sugar, light brown sugar, melted butter, a little bit of salt, and vanilla extract. Then, set aside about 1 cup of the mixture which you’ll use for the topping.
  • Layers – Press down the crumbs firmly into the prepared pan to form the crust, spread the jam, and sprinkle the remaining crumb mixture on top of the jam.
  • Bake – Bake until the crumbs are lightly golden and the jam is bubbly. Don’t forget to wait for the bars to fully cool in the pan before slicing or they will fall apart.

Keep in mind that these bars are quick to throw together but they do take a few hours to cool before cutting.

Raspberry Oatmeal Crumb Bars - A simple, one bowl recipe that takes just minutes to prepare. They make a great dessert, snack, or even breakfast!

Recipe variations

  • Different flavors – I love these with raspberry jam, but feel free to use your favorite one (strawberry, blueberries, peach, blackberry, apricot or plum are all great options!).
  • Add fresh berries – Feel free to add some fresh raspberries on top of the jam layer.
  • Add lemon – Add lemon zest to the crust or filling for a hint of tangy citrus flavor.
  • Icing – Drizzle a vanilla glaze/icing over the top of the raspberry squares.
  • Make them dairy-free – Use coconut oil in place of butter.
  • Make them gluten-free. Swap the flour for your favorite 1:1 baking blend, and use certified gluten-free oats.

These bars are delicious served with a small scoop of vanilla ice cream!

Storage & freezing instructions

To store – Keep bars in an airtight container in the refrigerator for up to 1 week.

To freeze – You can freeze them for up to 3 months. Let the bars cool completely, then cut them into squares. Place the squares on a baking tray and place that in the freezer for 1 1/2 or 2 hours. Now the bars should be firm enough to stack in a freezer bag or freezer-safe container. 

To thaw – When ready to enjoy the raspberry bars, remove them from the freezer and let them sit at room temperature until no longer frozen.

Frequently Asked Questions

Can I use quick oats or instant oats?

No, quick-cook and instant oats are finer and will change the consistency of the bars.

Can I freeze raspberry bars?

These raspberry bars freeze for up to 3 months. Once completely cooled, cut them into squares, place them on a baking tray, and set that in the freezer for 2 hours. After that, the bars should be firm enough to stack in a freezer bag or freezer-safe container. 

Can I use a different size baking dish?

If you don’t have an 8×8 baking dish, I wouldn’t use a bigger size pan as it changes the thickness of the bars (and these bars are already thin). If using a smaller size baking pan, adjust the baking time accordingly.

Can I use fresh or frozen raspberries?

Toss 2 cups of raspberries with  2 teaspoons of cornstarch, 1/3 cup of sugar, and 2 tablespoons of lemon juice. You don’t need to thaw frozen raspberries.

More fruity desserts:

If you make this recipe, please leave a feedback and rating in the comment section below. I always love hearing how it turns out for you! ♡

Raspberry Oatmeal Crumb Bars - A simple, one bowl recipe that takes just minutes to prepare. They make a great dessert, snack, or even breakfast!
Raspberry Oatmeal Crumb Bars - A simple, one bowl recipe that takes just minutes to prepare. They make a great dessert, snack, or even breakfast!
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(5 stars) 13 ratings

Raspberry Oatmeal Crumble Bars

These Raspberry Oatmeal Crumble Bars are filled with a delicious raspberry jam and topped with a buttery, crumbly oat topping! They’re easy to throw together and if you need to plan ahead these bars are even freezer friendly!

Ingredients

  • 1 cup+ 1 tablespoon (130 g) all-purpose flour
  • ¾ cup (75 g) rolled oats
  • ⅓ cup (66 g) granulated sugar
  • ¼ cup firmly packed (50 g) light brown sugar
  • ¼ teaspoon salt
  • ½ cup (115 g – 1 stick) unsalted butter melted
  • 1 teaspoon vanilla extract
  • 1 cup (315 g) raspberry jam

Instructions

  • Preheat the oven to 350°F (175°C). Line an 8×8-inch (20×20 cm) pan with aluminum foil, leaving enough overhang on the sides.
  • Spray with cooking spray and set aside.

Make the crust/crumble

  • In a large mixing bowl, combine the flour, oats, granulated sugar, brown sugar, and salt.
  • Pour in the melted butter and vanilla, and stir until the dry ingredients are evenly moistened.
  • Set aside 1 cup of the crumble mixture, then press the rest into the prepared pan to create a smooth layer.

Spread the raspberry jam

  • Spread the jam over the crust. If your jam is cold, warm it up for about 30 seconds in the microwave so it’s easy to spread. 

Add the topping

  • Sprinkle the reserved crumbs evenly over the jam layer.

Bake

  • Bake the bars for 28-30 minutes, until the jam is bubbly and the crumb topping is lightly golden. Place the pan on a wire rack to cool completely before cutting into squares.

Notes

Storage – Store the crumble bars in an airtight container in the refrigerator for up to a week or freeze for up to 3 months.

Nutrition

Serving: 1 bar, Calories: 313 kcal, Carbohydrates: 51.9 g, Protein: 2.7 g, Fat: 10.6 g, Saturated Fat: 6.5 g, Cholesterol: 27.4 mg, Sodium: 64.6 mg, Fiber: 1.3 g, Sugar: 33.9 g
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