Raspberry Blueberry Bars – A Recipe for Delicious and Beautiful Treats
Oh my gosh these raspberry blueberry bars are absolutely FABULOUS!!!! Not only are they beautiful, but they’re extraordinarily delicious!!
And that’s really saying something for me! I’m not a real fan of fruit in my baked goods. In fact, I avoid it almost every chance I get. (Except for toasted sugar champagne cake or my wonderful husband’s pear tart. Hmmm – I guess it’s really only bars or muffins or cookies…)
But THESE!!! They have me rethinking the whole fruit/baked good idea. After much thought, I decided it’s because the fruit is fresh, not jammy or cooked. But whatever it is, these are fantastic! And the white chocolate in them doesn’t hurt a bit! Plus, aren’t they gorgeous?! I love those colors!

Baking with my niece
The reason I even made these is because of my niece. (I’m sure I wouldn’t have chosen to bake something with fruit in it on my own!) But a couple years ago at Christmas, I gave her a cookie cookbook*. We decided that we’d make a different recipe every month. We didn’t quite make every month, but we have done several recipes from it, and they’ve all been delicious.
This raspberry blueberry bars recipe is only slightly altered from the receipe in the book. More vanilla, less chocolate (oddly,) and adding blueberries. We used parchment paper instead of foil too. I think the paper actually works better, and isn’t as annoying if it should happen to rip!
Raspberry Blueberry Bars Ingredients
This is really a pretty basic recipe – just the usual blondie ingredients. But adding in the white chocolate and the berries is what makes these raspberry blueberry bars so deliciously different.

And the chocolate is really the only tricky part. The white chips you see in the picture above, are ALL of them. They get divided not once, but twice in the preparation.
And they need to be melted. The directions call for melting them in the microwave, but I’ll have to just trust that that method works, because I don’t actually have a microwave, and have never done it. It’s not that I have anything against microwaves – we just don’t ever need one. And we don’t have enough counter space to put one in the kitchen anyway! So I melt my chocolate in a pan on the stove. Either method should work!
Step One – Mixing
The complete recipe is below, but I’ll give you the highlights and tips as we go along.
The first thing we do is mix the dry ingredients except the sugar. The recipe actually calls for using a whisk for this, which I thought was great, since I always use a whisk for mixing my dry ingredients! I think it works better than a spoon for getting the various ingredients thoroughly mixed.
You only need a small bowl for this, as you’re just going to pour this bowl into another bowl later. Set it aside for now.

Step Two – Melting
Then you melt your first portion of chocolate – the 3 ounces – and set it aside too. We used white chocolate chips here, but you could use the white chocolate of your choice. (We actually made two batches, one with the chips and one with some fancy baking chocolate. I’m pretty sensitive to flavors, but honestly, I couldn’t tell the difference!)
Step Three – More Mixing
Another place where we veered from the book was in the blending. The book called for using the paddle of a stand mixer for beating the butter and sugar, but the first batch we made really didn’t work at all. It seemed like there wasn’t enough in the bowl – maybe my stand mixer is too big – and the paddle barely touched the butter! All it did was flatten it out on the bottom. So we scooped it out of there and finished beating it with the hand mixer. That was great!
Once the butter and sugar were creamed, we added the egg, vanilla, and melted chocolate one at a time, beating well of course, between each one.

Then we got to separate our chocolate one last time. The recipe calls for adding the remaining pieces except for 2 tablespoons. So we measured those out and stirred in the rest.

Step Four – The Actual Raspberry Blueberry Bars
And now comes the fun part with the actual berries! First, spread the batter into the pan. It’s pretty thick, so it had to be scooped out of the bowl rather than poured.

It took a minute with the spatula to get it smoothed.

Then we tossed the berries with the 2 tablespoons of sugar. We would have skipped the extra sugar here, but the recipe said that it was to help them caramelize. And anything with “caramel” in it is ok with me! They really did taste extra good.

My niece spooned on the fruit,

and pushed it down into the batter a little bit.

Step Six – The Raspberry Blueberry Bars Get Baked
Then our raspberry blueberry bars went into the oven! They turned out beautifully golden and puffy, just like the recipe said they should. Ours took about 30 minutes, but be sure to check them early and watch – every oven is different.

The recipe now advises that you let them cool in the pan for two hours!! THAT was hard! But we managed to amuse ourselves doing other things, and came back as close to two hours as we could wait!
The raspberry blueberry bars were cool enough to touch, and that’s probably the point.
Step Seven – The Topping
And finally, we got to melt the remaining two tablespoons of white chocolate and drizzle it over the bars. SO good!!

The book then advises you to let the bars stand another 30 minutes for the drizzle to set before you cut and eat them. That’s why there’s so much extra time in the “Total Time” box in the recipe. 2 1/2 hours of cooling and setting bring the total to about 3 1/2 hours.
I’m here to say though – it’s worth the wait!! I can’t recommend these raspberry blueberry bars highly enough! In fact, my niece took the batches we made to a party the next day, and she reported that they were the stars of the show!

Scroll down to shop for anything you might need to make them, and then carry on to the recipe.
I hope you try these as soon as possible! I know you and your guests will love them!

Barbara’s Boutique Selections
Click on the pictures of the pieces I used in this post. If the exact item isn’t available any more, I chose a similar option.
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The Raspberry Blueberry Bars Recipe
Raspberry Blueberry Bars – A Recipe for Delicious and Beautiful Treats
Course: Dessert16
servings30
minutes35
minutes3
hours40
minutesThese moist, white chocolate, raspberry, and blueberry-laced bars are seriously fabulous! They’re as fresh tasting and delicious as a dessert can be – perfect for summer or any time! Make a double batch – nobody will be able to stop eating them!
Ingredients
1 cup all-purpose flour
1 teaspoon baking powder
1/4 teaspoon salt
5 oz white chocolate, coarsely chopped (or chips) (divided into one 3 oz portion, and one 2 oz portion)
4 tablespoons unsalted butter, softened
1/2 cup + 2 tablespoons sugar
1 large egg
2 teaspoons vanilla extract
2/3 cup fresh raspberries
1/3 cup fresh blueberries
Directions
- Adjust oven rack to middle position and preheat oven to 375 degrees F
- Line 8 inch square baking pan with parchment paper
- Whisk flour, baking powder, and salt together in small bowl
- Chop 3 oz of white chocolate and microwave in small bowl at 50 percent power, stirring often, until melted, about 1 minute
- Chop remaining 2 oz of chocolate
- Using hand mixer, beat butter and 1/2 cup sugar on medium-high speed until pale and fluffy, about 1 minute
- Add vanilla and egg and beat until combined
- Add melted chocolate and mix until incorporated, about 30 seconds
- Reduce speed to low and slowly add flour mixture until combined, about 45 seconds
- Stir in all but 2 tablespoons of the remaining chopped chocolate
- Put batter into prepared pan and spread into an even layer
- Toss berries in remaining 2 tbs sugar to coat, and gently press into batter
- Bake until edges are puffed and golden, and a toothpick inserted in center comes out with a few moist crumbs attached, 25 – 35 minutes
- Let cool completely in pan on a wire rack, about 2 hours
- Microwave reserved 2 Tbs chocolate in a bowl at 50 percent power, stirring occasionally, until melted, about 45 seconds
- Drizzle melted chocolate over bars
- Using parchment overhang, remove bars from pan
- Cut into 16 pieces and let chocolate set for about 30 minutes before serving
Pin the Raspberry Blueberry Bars Recipe for Later

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Yummy Barb…I will be adding this recipe to my file. You always have such beautiful decorating ideas. Have a happy and safe week. Hugs and Blessings.
Thanks Kari! I’m sure you’ll love it – in fact, I’m making another batch today! Thanks so much for stopping by – always love to see you!
Oh, these look so good Barbara!! And white chocolate is a fave (I’d probably have to add a bit extra lol). Thanks for the great instructions too. Pinning. Happy Thursday my friend!
Ha – I know! I was surprised at us for taking some of the chocolate out, but just a tiny bit less was actually better. (Ok, I did finish up the leftover chocolate myself – you hate to waste anything … !!) Thanks for dropping by, and for pinning, my friend! You’re always such a help to a hostess! 💛
Yum Barbara! I love the white chocolate chips and drizzle!
Jenna! How lovely to see you! I’m so glad you stopped by and I hope you’re doing well down there! Yes, you just can’t get too much white chocolate, right?! See you out there my friend!
These look…well, over the top deliciousness and summery treat! I have honestly never come across a recipe combining 2 different fruits, but together they present so beautifully! I (of course) pinned this recipe, and can’t wait to try it. BTW, I’m a little jealous that you get to bake with your niece. My niece has her hands full right now with 2 toddlers and a newborn. Maybe in a few years, we can bake something together!
Oooh you’re going to love them Kristine! I was honestly surprised at how fabulous these are! Good thing my niece took most of them with her! I hope you and your own niece can bake again soon, or maybe you can make some and take them to her. Sounds like she could use a little treat with her hands so full! 😊 Always so lovely to see you! Hope you’re having fun this summer!