These Chocolate Rhubarb Brownies are a delightful twist on a classic dessert, combining the sweet richness of a soft, buttery brownie with the bright, tangy flavour of fresh rhubarb.

Every bite is perfectly balanced, with pockets of tart rhubarb adding a refreshing contrast to the tender, cake-like texture.  This delicious recipe yields 12 brownies.  

They have a moist, melt-in-your-mouth texture that stays delicious for days.

The combination of sweet and tart flavours makes these bars a standout dessert for spring and summer.

Whether served with a cup of coffee or enjoyed as an afternoon treat, they’re a delicious way to celebrate rhubarb season.

Printable Recipe Card with a Full List of Ingredients and Instructions is Located at the Bottom of the Post.

Be sure to read through the entire post so that you don’t miss out on any important tips and tricks!

To make these delicious Chocolate Rhubarb Brownies I started by dicing up some rhubarb.

Then I melted some butter in the microwave on low power.

I measured some granulated sugar, vanilla extract, cocoa powder, Bob’s Red Mill All Purpose Gluten Free Baking Flour and a bit of xanthan gum into the melted butter.  I stirred the ingredients until well combined.

Next I added in some large eggs and vanilla extract. I beat them into the chocolate batter.

Once the ingredients were combined I folded in the diced rhubarb and some semi-sweet chocolate chips.

I sprayed an 8″ square baking pan with cooking spray.

Then I scraped the brownie batter into the prepared pan and spread it out evenly.

I baked the Chocolate Rhubarb Brownies in a preheated 375F oven for 35 – 40 minutes or until a toothpick inserted in the center came out almost clean.

After 40 minutes I removed the brownie from the oven and allowed the pan to cool.

These Chocolate Rhubarb Brownies are soft, buttery dessert bars packed with the fresh, tangy flavour of rhubarb.

 

Each square is packed with homemade charm and the comforting flavors of a classic farmhouse dessert.

They’re an excellent way to use up a bumper crop of garden-fresh rhubarb.

These old-fashioned dessert bars are perfect for potlucks, picnics, bake sales, and family gatherings.

Printable Recipe Card with a Full List of Ingredients and Instructions is Located at the Bottom of the Post.

Here Are More Brownie Recipes For You To Enjoy…

PRINTABLE VERSION OF THE RECIPE CAN BE FOUND AT THE BOTTOM OF THE PAGE

Ingredients You’ll Need to Make these Chocolate Rhubarb Brownies:

• 1 1/2 cups rhubarb, diced
• 1/2 cup butter, melted
• 1 cup granulated sugar
• 3/4 cup Bob’s Red Mill All Purpose Gluten Free Baking Flour
• 1/3 cup cocoa powder
• 1/2 tsp xanthan gum
• 2 eggs, large
• 1 tsp vanilla extract 
• 1/4 cup semi-sweet chocolate chips

How to Make Chocolate Rhubarb Brownies:

1. Preheat oven to 375F.
2. Grease an 8″ square pan. 
3. Dice the rhubarb.
4. Melt the butter in the microwave on low power.
5. Add the granulated sugar, gluten free flour, cocoa powder and xanthan gum.
6. Stir in the eggs and vanilla extract.
7. Fold in the diced rhubarb and semi-sweet chocolate chips.
8. Use a rubber spatula to scrape the mixture into the prepared pan evenly.
9. Bake for 35-40 minutes or until a toothpick inserted in center comes out almost clean.
10. Remove from oven.
11. Allow to cool. 
12. When finished cooling slice into squares.
13. Enjoy!

FAQs:

What should I serve with chocolate rhubarb brownies?

Chocolate Rhubarb Brownies are sweet, buttery, and pleasantly tart, making them easy to pair with a variety of drinks and accompaniments. Here are some delicious serving ideas:

Creamy Pairings

• A scoop of vanilla ice cream adds a cool, creamy contrast to the tart rhubarb.
• Freshly whipped cream makes these bars feel extra special without overpowering their flavor.
• A dollop of lightly sweetened Greek yogurt works well for a lighter dessert option.

Fresh Fruit

• Fresh strawberries are a natural match for rhubarb and add even more seasonal flavor.
• Mixed berries such as raspberries, blueberries, and blackberries complement the sweet-tart notes beautifully.
• A simple fruit salad adds color and freshness to the dessert table.

Hot Beverages

• A cup of coffee balances the sweetness and pairs wonderfully with the buttery texture.
• Earl Grey tea or English Breakfast tea complements the fruity rhubarb flavor.
• Herbal teas such as chamomile or berry blends make a cozy afternoon treat.

Cold Drinks

• Homemade lemonade echoes the bright, tangy flavor of the rhubarb.
• Iced tea is refreshing alongside these sweet dessert bars.
• Sparkling water with a squeeze of lemon or lime keeps the dessert feeling light.

For a Dessert Platter

• Serve alongside gluten free shortbread cookies, sugar cookies, or butter cookies for a charming dessert assortment.
• Pair with mini cheesecakes or fruit tarts for a spring or summer dessert buffet.
• Add fresh strawberries and a small bowl of whipped cream for an easy and elegant presentation.

For a truly classic combination, serve Chocolate Rhubarb Brownies slightly warm with a scoop of vanilla ice cream and a handful of fresh strawberries on the side. It’s simple, seasonal, and always a hit. 🍓🍨

How do I store chocolate rhubarb brownies?

How to Store Chocolate Rhubarb Brownies

Chocolate Rhubarb Brownies are easy to store and stay moist and delicious for several days.

At Room Temperature:
Store the brownies in an airtight container for up to 2 days. If your kitchen is particularly warm, it’s best to refrigerate them, especially if they are topped with a glaze.

In the Refrigerator:
Place the brownies in an airtight container and refrigerate for up to 5 days. For best results, separate layers with parchment paper to prevent sticking.

To Freeze:
Allow the brownies to cool completely, then wrap individual squares or the entire batch tightly in plastic wrap and place in a freezer-safe container or bag. Freeze for up to 3 months.

To Serve After Freezing:
Thaw the brownies overnight in the refrigerator or for a few hours at room temperature. If desired, let them come to room temperature before serving for the best texture and flavor.

Storage Tip:
The sweet-tart rhubarb flavour often becomes even more pronounced after a day, making these brownies just as delicious—if not better—the next day.