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close-up photo of a strawberry rhubarb brownie surrounded by more brownies

Double Chocolate Rhubarb Brownies

These strawberry rhubarb brownies feature a unique combination of flavors with sweet, tart, and tangy tastes! They're a decadent, early summer treat.
Course Dessert
Cuisine American
Prep Time 15 minutes
Cook Time 55 minutes
Total Time 1 hour 10 minutes
Servings 16 brownies
Calories 175kcal



  • Preheat the oven to 350 degrees F. Line an 8x8 baking pan with parchment paper or foil. Lightly grease the parchment or foil with butter or a cooking spray.
  • In a large bowl, cream the butter and sugar. Whisk in the eggs and vanilla. In a separate bowl, stir together the flour, cocoa powder, baking powder, and salt. Slowly add the dry ingredients to the wet ones, mixing as you go, until everything is incorporated. Fold in the rhubarb, strawberries, and chocolate chips. Stir well.
    batter for rhubarb brownies in a bowl with rhubarb, berries, and chocolate mixed in
  • Transfer the batter to the prepared baking dish, and use a rubber spatula to spread it out evenly in the pan. The batter will be sticky, so it will take a little effort to spread it in an even layer that fills the entire pan. Press some thinly sliced strawberries on the top of the batter if desired. I like to do this to add an extra pop of color, but it's up to you.
    strawberry rhubarb brownies in a square pan before baking
  • Bake the brownies for 45 to 55 minutes, until a toothpick inserted in the center comes out clean. Let the brownies cool for a few minutes before slicing into square. Enjoy!
    baked rhubarb brownies on a piece of parchment paper on a counter


  • Store brownies in an airtight container on the counter for up to 5 days. Store the container in the fridge if you want the brownies to last a little longer.
  • To freeze the brownies, wrap each one in plastic wrap then place in a freezer-safe bag or container. Store for up to 3 months. Enjoy frozen or thawed. To thaw quickly, unwrap a brownie, place it on a microwave-safe plate, and microwave for 20 to 30 seconds until warm.
  • These brownies would also taste delicious with a scoop of vanilla ice cream!


Serving: 1brownie | Calories: 175kcal | Carbohydrates: 23g | Protein: 3g | Fat: 9g | Saturated Fat: 5g | Trans Fat: 1g | Cholesterol: 36mg | Sodium: 83mg | Potassium: 151mg | Fiber: 2g | Sugar: 15g | Vitamin A: 219IU | Vitamin C: 6mg | Calcium: 27mg | Iron: 1mg