Gluten Free Rhubarb Bars are the recipe that Lucia makes every spring for every gathering where she wants every single person at the table to be able to enjoy the most completely extraordinary sweet-tart rhubarb custard bar without any concern about dietary restrictions, because this recipe is designed from the very beginning to be completely and naturally gluten-free without any compromises to the most beautifully tender shortbread base or the most silky and deeply rhubarb-flavored custard filling that makes these bars so genuinely and completely irresistible.
By using a trusted one-to-one gluten-free flour blend in place of all-purpose throughout the entire recipe, she produces bars that are completely indistinguishable from the conventional version in every quality including crust texture, filling silkiness, and overall deeply satisfying flavor experience.
Gluten Free Rhubarb Bars are the most easy and completely inclusive spring dessert bars made with a gluten-free shortbread crust of one-to-one gluten-free flour sugar and butter topped with a sweet tart rhubarb custard filling of eggs sugar gluten-free flour salt and fresh rhubarb baked together at 350°F for the most perfectly set and deeply satisfying gluten-free spring bar. Come follow us on Pinterest where we share beautiful spring dessert recipes and easy inclusive baking favorites from our kitchen every single week.
Table of Contents
Why You Will Love This Gluten Free Rhubarb Bars Recipe
This Gluten Free Rhubarb Bars recipe is the spring dessert that allows every person at every gathering to participate fully in the most celebratory and deeply satisfying rhubarb bar experience without any adaptation, substitution, or compromise to what is served to anyone else at the table. These bars are not a lesser version of a conventional rhubarb bar made gluten-free by an awkward substitution. They are a completely intentional and beautifully designed gluten-free rhubarb bar from the first ingredient to the last that is genuinely extraordinary in its own right.
The one-to-one gluten-free flour blend is the most essential ingredient specification for the most successful result in this recipe. A quality one-to-one blend that contains xanthan gum already incorporated into the flour produces the most comparable texture to all-purpose flour in both the shortbread crust and the custard filling without any additional binding agents or modifications to the recipe technique. Our Rhubarb Crumble Ice Cream makes a beautifully equally rhubarb-forward and equally spring-vibrant companion for a complete and wonderful gluten-free rhubarb dessert collection.
Ingredients Needed for This Gluten Free Rhubarb Bars Recipe
For the Gluten-Free Shortbread Crust:
- 1 cup Gluten-Free One-to-One Flour Blend (with xanthan gum)
- ½ cup Granulated Sugar
- ½ cup Unsalted Butter, room temperature
For the Rhubarb Custard Filling:
- 2 large Eggs
- 1 cup Granulated Sugar
- ¼ cup Gluten-Free One-to-One Flour Blend
- ¼ tsp Salt
- 2 cups Fresh or Frozen Rhubarb, diced
- Optional: Powdered Sugar for dusting before serving
How to Make This Gluten Free Rhubarb Bars Recipe
Preheat the oven to 350°F. Line an 8 by 8-inch pan with parchment paper, bringing the parchment up all four sides for the most effortless lifting.
For the gluten-free shortbread crust, place the gluten-free flour blend, granulated sugar, and room-temperature butter in a food processor. Pulse until the mixture just comes together into the most beautifully crumbly and cohesive dough. Press the mixture firmly and evenly into the prepared pan. Bake for 15 minutes. The crust will remain very pale in color and this is completely correct.
While the crust bakes, prepare the rhubarb custard filling. In a medium bowl, combine the eggs, granulated sugar, gluten-free flour blend, and salt. Whisk together well for approximately 1 minute without over-whisking. Stir the diced rhubarb through the egg mixture until evenly distributed, cara mia.
Remove the hot crust from the oven immediately when the 15 minutes are complete. Pour the rhubarb custard filling directly onto the hot crust without allowing either to cool. Return the pan to the oven and continue baking for 40 to 45 minutes until the filling is completely set with no jiggling when the pan is gently shaken.
Allow the bars to cool completely in the pan. Use the parchment overhangs to lift the entire slab cleanly from the pan onto a cutting board. Cut into squares. Dust with powdered sugar before serving if desired for the most elegant and completely lovely gluten-free spring presentation.
How to Serve This Gluten Free Rhubarb Bars Recipe
Serve at room temperature or cold from the refrigerator for the most completely refreshing and most beautifully set gluten-free rhubarb bar experience. These bars are the most perfectly portable and most completely practical individual dessert for spring picnics, barbecues, potlucks, and gatherings where a variety of dietary needs must be accommodated beautifully and without any visible differentiation in quality or presentation.
Arrange on a beautiful white platter with a generous powdered sugar dusting applied immediately before presenting at the table for the most completely lovely and most genuinely elegant gluten-free spring dessert display. Our Rhubarb Bread makes a beautifully equally rhubarb-forward and equally easy companion for a complete and wonderful everyday gluten-free rhubarb collection.
How to Store This Gluten Free Rhubarb Bars Recipe
Store in an airtight container in the refrigerator and enjoy within the first 1 to 2 days for the most fresh and most deeply flavorful result. These gluten-free bars are at their very best on the day they are made and the day after. They are not recommended for freezing as the texture becomes gooey upon thawing.
Tips to Make This Gluten Free Rhubarb Bars Recipe
Use a quality one-to-one gluten-free flour blend that already contains xanthan gum for both the crust and the filling. This type of blend is specifically designed to function most similarly to all-purpose flour in baked goods without requiring additional binders. Blends that do not contain xanthan gum may produce a crumbly and less structurally cohesive crust and a less properly set filling.
Look for the most deeply ruby-red rhubarb stalks for the most vibrant and most beautifully pink finished bars. Deeply colored rhubarb produces the most stunning natural pink color in the custard filling that makes these gluten-free bars look as genuinely beautiful as any conventional rhubarb bar on the dessert table.
Helpful Notes for This Gluten Free Rhubarb Bars Recipe
The recipe technique is identical to the conventional rhubarb dream bars recipe with the single substitution of gluten-free one-to-one flour blend for regular all-purpose flour in both the crust and the filling. No other changes to technique, quantity, or baking time are required. This makes the recipe genuinely easy and completely straightforward for any baker already familiar with the original format.
Fresh or frozen rhubarb both work beautifully in this gluten-free version. If using frozen rhubarb, add it directly to the egg mixture without thawing. The baking time may need to be extended by approximately 5 minutes to accommodate the additional moisture from the frozen fruit.
Variation of This Gluten Free Rhubarb Bars Recipe
Maria made a gluten-free strawberry rhubarb version by adding 1 cup of fresh sliced strawberries to the custard filling alongside 1 cup of rhubarb for the most classically beloved and completely beautiful naturally gluten-free strawberry rhubarb custard bar that was deeply vibrant and completely irresistible. Teresa tried using almond flour for the shortbread crust in place of the gluten-free blend for the most delicately nutty and deeply fragrant almond rhubarb bar.
For a dairy-free and gluten-free version, substitute solid coconut oil for the butter in the crust in the same quantity for the most completely allergy-friendly rhubarb bar that accommodates both gluten and dairy sensitivities without any compromise to the most beautifully tender crust texture. Our Vegan Lemon Blueberry Cupcakes make a beautifully equally allergy-friendly and equally spring-vibrant companion for a complete and wonderful inclusive spring baking collection.
FAQs About This Gluten Free Rhubarb Bars Recipe
Which gluten-free flour blend works best in this recipe?
A one-to-one gluten-free baking flour blend that already contains xanthan gum produces the most comparable result to conventional all-purpose flour in both the shortbread crust and the custard filling. Popular options include Bob’s Red Mill 1-to-1 Baking Flour, King Arthur Measure for Measure Flour, and Cup4Cup. These blends are specifically designed to substitute for all-purpose flour in baked goods with the most minimal textural and structural differences.
Are these rhubarb bars completely gluten-free?
Yes, when made with a certified gluten-free one-to-one flour blend, both the shortbread crust and the custard filling are completely gluten-free. Always check the specific gluten-free certification on the flour blend packaging to ensure it meets the standards required for those with celiac disease or significant gluten sensitivity.
Can I add strawberries to these gluten-free rhubarb bars?
Yes and the classic strawberry rhubarb combination is one of the most completely beloved and most naturally beautiful additions to these bars. Substitute 1 cup of fresh sliced strawberries for 1 cup of the rhubarb, maintaining the total 2-cup fruit quantity, for the most vibrant and deeply fruity gluten-free strawberry rhubarb custard bar.
Conclusion
These Gluten Free Rhubarb Bars are the most completely inclusive and deeply satisfying spring dessert bar that makes every person at every gathering feel fully welcomed and completely celebrated through the most vibrantly sweet-tart and creamy rhubarb custard over the most buttery and perfectly tender gluten-free shortbread in every single individually cut and completely irresistible spring bar bite that everyone can enjoy together without exception. We hope they bring the same deeply welcoming spring joy and the same completely satisfied gathering to your kitchen that they have always brought to ours. Make them, share them, and come back to tell us all about it. With all our love, Maria, Lucia, and Teresa.
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Gluten Free Rhubarb Bars The Most Easy Sweet Tart Classic Spring Rhubarb Bar You Will Bake
- Total Time: 1 hour 5 minutes plus cooling
- Yield: 16 bars 1x
Description
The most easy and inclusive Gluten Free Rhubarb Bars made by pulsing gluten-free one-to-one flour blend granulated sugar and room temperature butter in food processor until crumbly pressing into a parchment-lined 8×8-inch pan baking at 350°F for 15 minutes then whisking eggs granulated sugar gluten-free flour and salt for exactly 1 minute stirring in 2 cups diced rhubarb pouring over hot crust baking 40 to 45 minutes until completely set cooling completely and cutting into squares with optional powdered sugar dusting. A completely perfect naturally gluten-free spring rhubarb bar recipe.
Ingredients
1 cup Gluten-Free One-to-One Flour Blend with xanthan gum for crust
1/2 cup Granulated Sugar for crust
1/2 cup Unsalted Butter room temperature
2 large Eggs
1 cup Granulated Sugar for filling
1/4 cup Gluten-Free One-to-One Flour Blend for filling
1/4 tsp Salt
2 cups Fresh or Frozen Rhubarb diced
Powdered Sugar for dusting optional
Instructions
1. Preheat oven to 350°F. Line 8×8-inch pan with parchment bringing up all sides.
2. Pulse gluten-free flour, sugar, and room temperature butter in food processor until crumbly.
3. Press firmly and evenly into prepared pan.
4. Bake 15 minutes. Crust will remain very pale.
5. While crust bakes, combine eggs, sugar, gluten-free flour, and salt in medium bowl.
6. Whisk well about 1 minute. Do not over-whisk.
7. Stir diced rhubarb through egg mixture until evenly distributed.
8. Remove hot crust from oven immediately.
9. Pour rhubarb filling directly over hot crust without cooling.
10. Return to oven. Bake 40 to 45 minutes until filling completely set with no jiggling.
11. Cool completely in pan.
12. Lift slab with parchment onto cutting board. Cut into squares.
13. Dust with powdered sugar before serving if desired.
- Prep Time: 20 minutes
- Cook Time: 1 hour
- Category: Dessert, Bars, Gluten Free
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 bar
- Calories: 165
- Sugar: 19g
- Sodium: 88mg
- Fat: 6g
- Saturated Fat: 4g
- Unsaturated Fat: 2g
- Trans Fat: 0g
- Carbohydrates: 27g
- Fiber: 1g
- Protein: 2g
- Cholesterol: 38mg
Keywords: gluten free rhubarb bars, easy gluten free rhubarb bars recipe, naturally gluten free sweet tart rhubarb bars spring, best gluten free rhubarb custard bars
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