Strawberry Rhubarb Blondies

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Easy Strawberry Rhubarb Blondies make use of all those fresh strawberries and rhubarb! The easy cookie bars are sweet, buttery and slightly tangy. Perfect for summer picnics.

a stack of cookie bars with rhubarb and strawberries

We love strawberry crisp and can’t get enough of our buttery rhubarb crumb cake and rhubarb crisp, but how often do you often bake with strawberry and rhubarb together? We don’t do it enough.

We started with strawberry rhubarb bread, then quickly moved onto these Strawberry Rhubarb Blondies.

What does strawberry rhubarb taste like?

Raw rhubarb has quite a tart flavor. People often compare it to the flavor of green apples. But when you pair rhubarb with sweet strawberries (and sugar found in desserts), you get a wonderfully sweet & tangy treat.

What you’ll need:

ingredients for strawberry rhubarb blondies on a table

Key Ingredients:

  • Brown sugar. Light brown sugar or dark brown sugar work well in this recipe.
  • Butter. This recipe uses melted butter, which means easy mixing!
  • Vanilla extract. Try making your own vanilla extract at home. 😋
  • White chocolate. This is optional, but I recommend it! A high quality white chocolate bar or white chocolate chips can go inside this blondie batter. And you can drizzle the top of the blondies with extra white chocolate, too!

✨ See the recipe card for full ingredient amounts. ✨

Can I use frozen strawberries in place of fresh strawberries?

Yes! If you choose to use frozen berries, I recommend buying frozen whole strawberries. Thaw the strawberries and strain off any extra liquid. Then dice the strawberries as if they were fresh.

How to Make Strawberry Rhubarb Blondies

  • To prepare: Preheat oven to 350ºF. Spray an 8×8″ baking dish with cooking spray or line the pan with parchment paper.
  • Mix wet ingredients: In a large mixing bowl, whisk together melted butter and sugars. Add eggs and vanilla extract and whisk until smooth.
mixed butter and brown sugar in a bowl with a whisk
  • Add dry ingredients: Add flour, baking powder, and salt to the butter mixture and stir with a wooden spoon until combined. Batter will be thick like cookie dough.
  • Add fruit: Fold in ¾ cup of diced strawberries and ¾ cup sliced rhubarb. 
mixing strawberries and rhubarb into cookie dough
  • Assemble blondies: Pour batter into the prepared baking pan and spread into an even layer. Press the remaining strawberries and rhubarb into the top of the batter. Press in a few pieces of white chocolate if you’d like!
unbaked strawberry rhubarb blondies in a pan
  • Bake: Bake the rhubarb blondies for 30-35 minutes or until a knife is inserted and comes out clean.
baked strawberry rhubarb blondies with white chocolate drizzled over the top

Storage Instructions

When you have prepared a dessert with fresh fruit, it is best to store them in an airtight container in the refrigerator. This will help the bars to stay fresher longer.

You can freeze any leftovers, but because the strawberry rhubarb blondies have fresh fruit on top, fruit can become mushy.

Love strawberries and chocolate? Add fresh strawberries and rhubarb to brownie batter for strawberry rhubarb brownies!

overhead view of strawberry rhubarb blondies
overhead view of strawberry rhubarb blondies

Strawberry Rhubarb Blondies

4.86 from 21 votes
Easy Strawberry Rhubarb Blondies make use of all those fresh strawberries and rhubarb! The easy cookie bars are sweet, buttery and tangy. Perfect for summer picnics.
Servings 15
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes

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Ingredients
 

Instructions
 

  • Preheat oven to 350ºF. Spray a 8×8" baking pan with cooking spray or line the pan with parchment paper.
  • In a large bowl, whisk together melted butter and sugars. Add eggs and vanilla extract and whisk until smooth.  1  cup  unsalted butter, 1 1/4  cup  brown sugar, 1/2  cup  granulated sugar, 2  large eggs, 1  teaspoon  vanilla extract
  • Add flour, baking powder, and salt to the butter mixture and stir with a wooden spoon until combined. Batter will be thick. 2 1/2  cups  all-purpose flour, 1/2  teaspoon  baking powder, 1  teaspoon  salt
  • Mix in ¾ cup of diced strawberries and ¾ cup sliced rhubarb. 1 cup fresh strawberries, 1 cup fresh rhubarb
  • Pour batter into the prepared pan and spread evenly. Press the remaining strawberries and rhubarb into the top of the batter. Press a few pieces of white chocolate in the top of the batter if you'd like, too!
  • Bake blondies for 30-35 minutes or until a knife is inserted and comes out clean.
  • Cool completely. Drizzle the top of the bars with melted white chocolate. white chocolate, optional

Notes

*Love white chocolate? Add 5 ounces chopped white chocolate into the blondie batter.
The calories shown are based on the recipe being cut into 15 pieces, with 1 serving being 1 blondie bar. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate. **We are not dietitians and recommend you seek a nutritionist for exact nutritional information.**

Nutrition

Calories: 379kcal | Carbohydrates: 59g | Protein: 5g | Fat: 14g | Saturated Fat: 8g | Cholesterol: 62mg | Sodium: 147mg | Potassium: 137mg | Fiber: 1g | Sugar: 28g | Vitamin A: 445IU | Vitamin C: 6.3mg | Calcium: 46mg | Iron: 2.2mg
Course Dessert
Cuisine American
Calories 379
Keyword blondie bars, cookie bars, dessert with fresh fruit, how to make blondies, strawberry rhubarb dessert
About JulieJulie Clark

About Julie Clark

I'm Julie Clark, CEO and recipe developer of Tastes of Lizzy T. With my B.A. in Education and over 30 years of cooking and baking, I want to teach YOU the best of our family recipes.

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Sherri Rochester
21 days ago

5 stars
I am excited to try this recipe! I do have a question. It calls for a 9×13 pan but it is shown a square 8×8 or 9×9 pan. Which is best?

Elisabeth
1 year ago

5 stars
Loved this recipe! I made it with only rhubarb, no other fruit, and it was perfect. I added a bit of white chocolate, but it would’ve been good without too. Great recipe!

SallyJoJo
2 years ago

5 stars
Made half in 9x 9. used frozen blueberries and fresh rhubarb. 35 minutes in foil 9 x 9. Yummy!

Shelly
2 years ago

It was very hard to get into the 9×13 pan. Very thick and sticky. It barely covered the base of the pan and I had to move it around with my fingers

Meredith
2 years ago

Can you make these dairy-free using coconut oil or vegan/olive oil based butter instead of real butter?

Rebecca Knapp
3 years ago

5 stars
My bars are taking at least 45 minutes to bake and could go a little longer but the edges are starting to get too brown. Am I doing something wrong? I am using a glass dish, would that change anything?

Helen
4 years ago

Hi! Can you make this recipe with cherries instead of strawberries? And how big should the rhubarb slices be?
Thanks!
Helen

Alma Vorrei
4 years ago

I’m going to attempt to make these blondies for my hubby on Saturday! They look amazing!