Name: Raspberry Crumble Bar Recipe
Prep time: 20 min
Cook time: 30 min
Total time: PT-497504H2M2S
Cuisine: British
Ingredients: 175 g rolled oats; 200 g plain flour; 150 g light brown soft sugar; 1/2 tsp baking powder; 175 g unsalted butter (cold and cubed); 400 g fresh raspberries; 150 g raspberry jam; 1 tbsp lemon juice; 1 tbsp cornflour

Jump to Recipe· 4.4 from 31 reviews

If you’re craving a dessert that beautifully balances tart and sweet, with a satisfyingly crumbly texture, then this Raspberry Crumble Bar Recipe is your new best friend. These bars are a delightful medley of fresh raspberries and luscious jam layered beneath a golden, buttery oat crumble that practically melts in your mouth. Perfect for a cozy afternoon treat or a crowd-pleasing addition at your next gathering, this recipe will quickly become a staple in your baking repertoire.

Ingredients You'll Need

The image shows six small bowls arranged on a white marbled surface, each filled with different baking ingredients. At the top left, there is a white bowl with bright red raspberry jam next to a small amount of brown sugar. To its right is a wooden bowl filled with white sugar. Below the jam, a white bowl holds a bright yellow egg yolk. In the center, a white bowl contains a large amount of soft, pale yellow butter. To the bottom left, a tiny beige bowl has a small amount of salt, and next to it lies a dark brown bottle labeled vanilla. On the right side, a white bowl is filled with white flour, slightly mounded. photo taken with an iphone --ar 4:5 --v 7

Simple, wholesome ingredients come together to create the perfect harmony of flavors and textures in this recipe. Each component plays a crucial role in delivering that irresistible raspberry crumble bar sensation, balancing sweetness, tartness, softness, and crunch.

175 g rolled oats: Adds a hearty, chewy texture and a nutty flavor that complements the sweetness.

200 g plain flour: Provides structure to the crumble base and topping, ensuring the bars hold together.
150 g light brown soft sugar: Brings a deep, caramel-like sweetness that enhances both crumble and filling.
½ teaspoon baking powder: Gives a slight lift to the crumble mixture for that perfect crumbly bite.

175 g unsalted butter (cold and cubed): The star of the crumble, creating richness and a tender, flaky texture.
400 g raspberries: Fresh and vibrant, these are the heart of the filling with a gorgeous tart punch.
150 g raspberry jam: Adds sweetness and helps bind the raspberry filling together.

1 tablespoon lemon juice: Brightens the raspberry flavor, balancing sweetness with acidity.
1 tablespoon cornflour: Thickens the filling so it stays perfectly gooey without becoming runny.

How to Make Raspberry Crumble Bar Recipe

Step 1: Prepare the Crumble Base

First things first, preheat your oven to 200ºC (or 180ºC fan). Line a 9x9" square baking tin with parchment paper to prevent sticking and make removing the bars easier. In a large bowl, combine the rolled oats, plain flour, light brown sugar, and baking powder. Add the cold, cubed unsalted butter and use your fingers to rub everything together. The goal is to get a breadcrumb-like texture with no big lumps of butter remaining—this is what gives your crumble its lovely flaky consistency.

Step 2: Make the Raspberry Filling

In a separate bowl, gently mix the fresh raspberries, raspberry jam, lemon juice, and cornflour. The cornflour will thicken the filling nicely when baked, while the lemon juice adds that fresh tangy note that perfectly balances the natural sweetness. Lightly mash this mixture so the berries break down a bit but still retain some texture for bursts of flavor in every bite.

Step 3: Assemble the Layers

Take 500g of your crumble mixture and press it firmly into the bottom of your prepared tin—this will form a sturdy base. Pour your luscious raspberry filling over the oat base, smoothing it out evenly. Finally, sprinkle the remaining crumble mixture on top, leaving it loose to create that signature crumbled effect when baked.

Step 4: Bake to Golden Perfection

Pop the assembled tin into your preheated oven and bake for about 30 minutes, or until the top turns a beautiful golden brown and you can smell that inviting buttery aroma. Once baked, let the bars cool completely in the tin. Refrigerating them slightly helps the bars set, making it easier to cut clean slices.

How to Serve Raspberry Crumble Bar Recipe

The image shows a stack of crumb bars on a white plate with a white marbled surface underneath. Each bar has three clear layers: the bottom layer is a light tan crust that looks firm, the middle layer is a bright red raspberry filling with a slightly juicy texture, and the top layer is a crumbly golden brown streusel. Some bars lie flat around the stack, while one is leaning against it, showing all layers clearly. In the background, a small gold bowl filled with fresh red raspberries sits on a dark cloth, adding contrast. The overall look is inviting with textured crumbs and rich red filling. photo taken with an iphone --ar 4:5 --v 7

Garnishes

To elevate these bars, try dusting them with a light sprinkle of powdered sugar for an elegant touch. For extra indulgence, a dollop of whipped cream or a scoop of vanilla ice cream adds a creamy contrast that complements the tart raspberries magnificently.

Side Dishes

Serve these bars alongside a cup of your favorite tea or coffee—they pair beautifully for a cozy afternoon break. For brunch or casual gatherings, fresh berries or a fruit salad make refreshing sides that echo the raspberry flavors in the bars.

Creative Ways to Present

For a festive twist, cut the bars into bite-sized squares and arrange them on a platter with fresh mint leaves for a pop of color and aroma. You can also layer crumble bar pieces with Greek yogurt and a drizzle of honey in clear glasses for a stunning dessert parfait. These bars are as versatile as they are delicious!

Make Ahead and Storage

Storing Leftovers

Raspberry crumble bars keep wonderfully in an airtight container at room temperature for up to 3 days. For longer freshness, refrigerate them where they should stay moist and delicious for up to a week.

Freezing

Want to make these ahead of time? Wrap individual portions tightly in plastic wrap and place them in a freezer-safe bag or container. They freeze beautifully for up to 3 months—just thaw overnight in the fridge before enjoying.

Reheating

To bring back that freshly baked aroma and warmth, gently reheat bars in the oven at 150ºC for about 10 minutes or until warmed through. Avoid microwaving to keep the crisp crumble topping intact.

FAQs

Can I use frozen raspberries for the Raspberry Crumble Bar Recipe?

Absolutely! Frozen raspberries work well too. Just make sure to thaw and drain any excess liquid to prevent the filling from being too watery.

Is it possible to substitute the butter in this recipe?

Butter is essential for the authentic crumble texture, but you can use margarine if necessary. Keep in mind that it might slightly change the flavor and texture.

How do I know when the Raspberry Crumble Bars are done baking?

The tops should be golden brown, and you’ll smell a rich, buttery aroma. The bars should feel set and slightly firm to the touch once cooled.

Can I make this recipe gluten-free?

Yes! Use gluten-free rolled oats and substitute the plain flour with a gluten-free baking flour blend for similar results without the gluten.

What’s the best way to cut the bars without them crumbling?

Chilling the bars in the fridge before cutting helps them firm up and hold together better, resulting in clean slices with minimal crumbling.

Final Thoughts

There’s nothing quite like the comforting joy of homemade Raspberry Crumble Bars fresh out of the oven. This Raspberry Crumble Bar Recipe is a beautiful blend of textures and flavors that’s sure to impress anyone lucky enough to get a slice. So go ahead, bake a batch, share with friends, and watch this cozy treat become a cherished favorite in your kitchen!

Raspberry Crumble Bar Recipe

Ingredients You'll Need