Jammy Raspberry Crumble Bars layer a buttery brown sugar crumble cookie-like base with sweet and tart raspberries dolloped with strawberry jam and finished with a crumble topping. This quick and easy recipe comes together in less than 1 hour using one dough for both the base and topping.

Close up of raspberry crumble bars cut into square and stacked on a white round plate.

Perfect Raspberry Crumble Bars

Fruity desserts are a go-to in our family, and these perfect Raspberry Crumble Bars are no exception! I especially love preparing an easy bar recipe that only needs one dough but doesn’t skimp on flavor or presentation (just like these blackberry pie bars and lemon raspberry bars!).

With a few staple baking ingredients, you’ll whip up the melt-in-your-mouth delicious buttery brown sugar crumble for the crust and topping. Layer it with fresh raspberries tossed with sugar, vanilla, and a pop of lemon, and you’ll have yourself tasty raspberry bars in less than 1 hour!

All The Ingredients You'll Need

Ingredients for raspberry bars in bowls set on a flat surface.

Nothing fancy here. Just 10 simple ingredients that transform into the most delicious summer bars. Here’s what you’ll need:

Oats: Stick with old-fashioned rolled oats, not quick oats.
Flour: We’re using regular, all-purpose flour. I always use unbleached and unbromated flour (King Arthur flour is my go-to!).
Brown sugar: Use light or dark brown sugar. The darker sugar will add a bit more of a caramelized flavor.
Cinnamon: Adds a lovely flavor to the crust mixture. Add more or less, depending on your preference.
Salt: You only need ½ teaspoon. It’ll enhance the flavors of the other ingredients in the crust and crumble.
Unsalted butter: Using unsalted butter allows you to control the amount of salt in your bars. Make sure your butter is COLD.
Raspberries: I recommend using fresh raspberries. Frozen raspberries will release too much moisture and create soggy bars.
Vanilla: Splurge on a good-quality pure vanilla extract. It’ll make a difference.
Lemon: We’re adding the zest of 1 lemon to the filling for a burst of flavor. I find using a microplane zester gets the ideal fine texture.
Raspberry or strawberry jam: Use your favorite jam or preserves (any berry flavor would be delicious!).

Note: Want to use other berries? Stick with raspberries or blackberries since they release a similar amount of juice. Strawberries and blueberries will affect the overall texture of your bars.

How To Make Jammy Raspberry Crumble Bars

Before you begin: Preheat the oven to 350°F/177°C, line a 9x9-inch baking pan with parchment paper, and read the recipe from start to finish.

Oats, flour, sugar, cinnamon, and salt pulsed in a food processor bowl to combine and set on a flat surface.

Mix the crust: Give the oats, flour, brown sugar, cinnamon, and salt a few pulses in a food process to combine.

Raspberry bars crust made in a food processor bowl into a crumbly mixture.

Add butter: Add the cold butter and continue to pulse until a dough forms.

Raspberry bar crust baked into a 9x9 parchment-lined square pan.

Add crust: Press half of the dough into the prepared pan and bake for 10 minutes.

Raspberries, sugar, flour vanilla, and lemon zest combined in a glass mixing bowl.

Mix filling: Combine the raspberries, sugar, flour, vanilla, and lemon zest in a medium bowl, being careful not to break up all the raspberries.

Raspberry filling and dollops of raspberry jam layered over a oat crust.

Add filling: Spread the filling over the warmed crust into an even layer and dollop with the strawberry jam.

Raspberry bars with crumble topping unbaked in a 9x9 parchment-lined pan ready for baking.

Top with crumble: Crumble the remaining dough over the filling and bake for 30 minutes until the topping is lightly golden brown.

Raspberry crumble bars cut into squares set on a flat surface.

Recipe Tips and Tricks

These bars are a very quick and easy recipe, but to ensure they turn out perfect every time you’ll want to follow these few tips:

Splurge on quality ingredients. The ingredients are simple everyday ingredients. Selecting quality ingredients (like your jam and vanilla) will really give you the best flavor.
Weigh your ingredients. Using a digital kitchen scale takes the guesswork out of measuring and gives consistent results.
Pulse the crust ingredients into a dough. You want to make sure everything is thoroughly mixed together to ensure the butter evenly moistens the dry ingredients.
Even layering. Make sure to spread the filling into an even layer and crumble the dough evenly over the raspberries to ensure even baking for the perfect bars!

Raspberry crumble bars cut into square and stacked on a white round plate.

The Best Way To Slice Raspberry Bars

I have found that chilling these raspberry crumble bars first makes it easier to slice them into perfect squares. The cooled bars mean the filling is set, making it much easier to slice without a mess.

Once you remove your bars from the oven, transfer the hot baking pan to a wire rack to cool for about 30 minutes. Then, place the baking pan, uncovered, into the fridge and chill for about 2 hours before slicing.

Note: If you don’t want to wait for the bars to cool (I wouldn’t blame you!), you can slice them after cooling on a wire rack. They will be a bit more gooey (and delicious with a big scoop of vanilla ice cream!).

Want To Serve A Crowd?

You can! Just double the recipe and use a 9x13-inch baking pan that’s lined with parchment paper. You’ll need to add some additional time to the baking (about 5-10 minutes).

Close up of raspberry crumble bar with a bite out of it and stacked bars on a white round plate in the background.

How To Store These Bars

Keep these raspberry bars (completely cooled) in an airtight container in the fridge for up to 5 days.

Freeze any extra bars in a freezer-safe container for up to 3 months. When you’re craving these bars, you can let them thaw overnight in the fridge or just set them on the counter for 1-2 hours.

More Berry Recipes You'll Love

I hope you love these Raspberry Crumble Bars as much as we do and that they become a family favorite! Please leave a comment below, I love reading your feedback! And if you’d like to make this recipe later, don’t forget to pin it on Pinterest! Happy Baking!