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Strawberry Rhubarb Blondies

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.
Prep Time15 mins
Cook Time30 mins
Total Time45 mins
Course: Dessert
Cuisine: American
Keyword: blondie bars, cookie bars, dessert with fresh fruit, how to make blondies, strawberry rhubarb dessert
Servings: 15
Calories: 379kcal
Author: Julie Clark


  • cup  unsalted butter (melted)
  • 1 1/4  cup  brown sugar (packed)
  • 1/2  cup  granulated sugar
  • large eggs
  • teaspoon  vanilla extract
  • 2 1/2  cups  all-purpose flour
  • 1/2  teaspoon  baking powder
  • teaspoon  salt
  • 1 cup fresh strawberries (diced)
  • 1 cup fresh rhubarb (thinly sliced)


  • Preheat oven to 350 degrees. Spray a 9x13 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.
  • Add flour, baking powder, and salt to the butter mixture and stir with a wooden spoon until combined. Batter will be thick.
  • Mix in ¾ cup of diced strawberries and ¾ cup sliced rhubarb.
  • Pour batter into the prepared pan and spread evenly.
  • Sprinkle top with remaining strawberries and rhubarb.
  • Bake blondies for 27-30 minutes or until a knife is inserted and comes out clean.
  • Cool completely before slicing into 15 squares.


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.**


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