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Kaleb Wyse wearing a black shirt standing in front of a taupe background.

Why I Make These Raspberry Crumb Bars

I’m a firm believer that ingredients should be used when they’re ripe and in season. The problem is that where I live, Iowa, does not have seasonal produce for much of the year. Instead, we have to get creative and grow winter squash to keep during the cold months and preserve fruits and vegetables during the summer to be able to eat what we grew out of season.

Yes, you can now go to most grocery stores and get pretty much anything during any month. But I try to stick with the seasons, and the easiest way to enjoy is with fruit preserves and frozen fruit. I love both. Preserves have pieces of fruit in them and are cooked with sugar to create a thickened spread that’s useful with anything, just like these crumb bars.

Top down view of square pieces of golden colored crumb bars with a red raspberry filling peeking out
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What Is a Crumb Bar?

A crumb bar is simply a layered bar. Many bar recipes start with a shortbread-like crust where you press it into the pan, par-bake it, and then continue to layer. I wanted to make this recipe as simple as possible and let the raspberry pop.

These bars use a streusel-like crumb mixture in two ways:

  • After the butter is worked into the dry ingredients, crumbs are formed. They hold together when squeezed in a fist and easily fall apart when rubbed between fingers. Pressed into the bottom of the pan, the crumbs become the perfect crust. With the addition of oats, the crust is hearty, and pressing it helps it hold together and create a good base.
  • Once the jam is spread on top of the crust, the remainder of the crumbs become the best craggy topping. Little pockets of jam poke through, and odd-sized pieces of crumb provide a superb texture.

What Are Preserves?

Unlike a jam or a jelly, preserves have a higher ratio of chunks of fruit. For these bars, I’ll be honest that preserves and jam can be used interchangeably. However, be warned that jelly can melt into the bars and doesn’t offer the correct texture. To make sure the middle fruit layer is extra flavorful and has heft, frozen berries are sprinkled on top of the preserves. Frozen berries are picked and instantly frozen at peak ripeness and flavor. Adding them to the preserves adds complexity and so much extra flavor.

Two hands holding a raspberry crumb bar with a bite taken out with extra square bars in the background all on a white surface

Why Do These Bars Work?

These bars are not a bar cookie, like blondies, brownies, or more traditional bars. Instead, these crumb bars are at the intersection of flavor and texture, and it makes them the perfect dessert.

  • Both the streusel on top and the bottom crust have oats for texture, but also for flavor.
  • The crust does not need to be pre-baked, so these go together in a few minutes and are fully assembled when baked.
  • The crust comes out crispy, the center layer holds together without oozing all over, and the crumb topping is like any perfect pie topping.
  • When you take a bite of these bars, they’re not too sweet. Instead, they have a complexity that satisfies any adult with a good raspberry flavor and hints of brown sugar and cinnamon.
  • These also make any kid happy since they’re well-balanced flavor-wise and full of nostalgic goodness.
One square raspberry crumb bar sitting on white piece of parchment with a bit of red colored filling oozing out with extra bars in background

More Bar Recipes

Have I Convinced You to Make This Recipe?

I hope you make this recipe and put some food on your table. Leave a comment and share a star rating so you can let others know how much you love this recipe. This helps show others that this is a recipe they, too, can make, enjoy, and love!

Raspberry Crumb Bars

4.91 from 30 votes
With a crust-like first layer, a raspberry preserve filling, and a craggy top, these raspberry crumb bars are so delicious! It's like a pure bite of summer in an easy-to-make treat!
Prep: 15 minutes
Cook: 35 minutes
Total: 50 minutes
Servings: 9 servings
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Ingredients

  • 1 ¼ cups all-purpose flour
  • 1 ¼ cups old-fashioned oats
  • ¾ cup light brown sugar
  • ½ tsp kosher salt
  • ½ tsp baking soda
  • 1 ½ tsp ground cinnamon
  • 12 tbsp (1 ½ sticks) unsalted butter cold, cubed
  • 8 oz raspberry preserves
  • ¾ cup frozen raspberries

Instructions 

  • Preheat oven to 350°F. Line an 8 x 8-inch baking dish with a parchment sling and spray with nonstick spray. Set aside.
  • In a large bowl, combine the flour, oats, brown sugar, salt, baking soda, and cinnamon. Mix together until evenly combined. Add pieces of butter and work into the dry ingredients using hands or a pastry cutter. Squeeze butter and dry mixture between fingers until the mixture becomes like wet sand with pieces of butter the size of peas and smaller.
    1 ¼ cups all-purpose flour, 1 ¼ cups old-fashioned oats, ¾ cup light brown sugar, ½ tsp kosher salt, ½ tsp baking soda, 1 ½ tsp ground cinnamon, 12 tbsp (1 ½ sticks) unsalted butter
  • Pour 2 cups of the crumb mixture into the prepared baking dish. Lightly press to form an even crust. Spread raspberry preserves over the crust. Sprinkle with frozen raspberries. Top with remaining crumb mixture. Do not press crumbs, just sprinkle over the top.
    8 oz raspberry preserves, ¾ cup frozen raspberries
  • Bake in the preheated oven until the top turns slightly browned and puffed in the middle, 30-35 minutes. Remove from oven and cool at least four hours before slicing.

Video

Youtube video

Nutrition

Serving: 1 servingCalories: 387 kcal

Nutrition information is automatically calculated, so should only be used as an approximation.

Did you make this? Leave a comment below!

Kaleb Wyse is a New York Times bestselling author behind the popular Wyse Guide website. Living on his fourth-generation Iowa farm, he loves sharing recipes and gardening tips that come from traditions that feel comfortably familiar. His down-to-earth style makes sustainable living and farm life feel like home!

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4.91 from 30 votes (9 ratings without comment)

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27 Comments

  1. Grannygoat says:

    I just made these and they smell heavenly cooking in the oven. It’s going to be hard to wait 4 hours for them to cool before cutting! Looks like I will get some biking in once I take them from the oven so I won’t torture myself with the aroma! You make these look so easy, but you know, they REALLY are that easy. Thanks for this recipe….I have some fig orange spread I’m going to try next time. Then apricot. Then……who knows? 🙂

  2. Reggina Bradshaw says:

    5 stars
    My granddaughters loved it, even my son liked it, and he’s not big on sweets!
    Easy to put together, and bake. I made it with strawberries. I can’t wait to try it with raspberries.

  3. Lorraine says:

    5 stars
    LORRAINE March 21, 2021 at 7:48 pm Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    These are wonderful! I made mine gluten free. I used raspberry jam and frozen cranberries. I used quinoa instead of oatmeal to fit my dietary issues. Yum! Couldn’t wait 4 hours to cool and try so I tasted the corner. Yum! Many thanks for a wonderful recipe that is adaptable to my needs.

  4. Lorraine says:

    5 stars
    These are wonderful! I made mine gluten free. I used raspberry jam and frozen cranberries. I used quinoa instead of oatmeal to fit my dietary issues. Yum! Couldn’t wait 4 hours to cool and try to I tasted the corner. Yum! Many thanks for a wonderful recipe that is adaptable to my needs.

  5. Lenna says:

    5 stars
    Today, I made these with apricot jam, and wow! These are so good! I think any fruit would be fabulous. Thanks, Kaleb!

  6. Lorraine says:

    5 stars
    So good! I made them gluten free. I used raspberry jam and added a few frozen cranberries instead of raspberries. I substituted quinoa flakes for the oats. Couldn’t wait 4 hours for it to cool so I tasted the corner :). Yum! Thank you for a wonderful recipe that I could easily adapt to my individual needs.

  7. Sigal M says:

    5 stars
    Just one word on the recipe. Wow. I made it yesterday. All gone today. Thank you for a quick easy breezy tasty flavorful recipe.

  8. Julie Hinds says:

    These look delicious, I have a huge raspberry patch so of course lots of frozen berries and jam. I’m thinking of doing this in individual pie pans and serve hot with a scoop of vanilla ice cream!

  9. Phillip says:

    5 stars
    I am intrigued by this video to make these. Your style whether cooking, gardening or decorating is fresh and appealing. Such warmth radiates from you.
    Thank you for the time and energy you put into your post and videos.

  10. Mira says:

    5 stars
    Love your recipes.
    And everything around you.
    It’s all in style.
    You are really a great guy.