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Easy Gluten-Free Rhubarb Bars Recipe

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Hey y’all! Emily here, straight from my Austin kitchen, ready to share a recipe that’s become a springtime staple: Gluten-Free Rhubarb Bars! If you’re anything like me, you love a dessert that’s both delicious and a little bit wholesome. These bars are exactly that – tart, sweet, and perfectly crumbly, all while being completely gluten-free. Whether you’re a seasoned baker or just starting out, this recipe is designed to be easy and fun. Let’s get baking!

Why You’ll Love These Gluten-Free Rhubarb Bars

I’ve been tweaking this recipe for years, trying to get that perfect balance of flavors and textures. And trust me, these bars are a winner. Here’s why you’ll fall in love with them:

  • Gluten-Free Goodness: Made with oat flour and gluten-free oats, these bars are a treat everyone can enjoy.
  • Perfectly Tart and Sweet: The combination of rhubarb and raspberries creates a delightful flavor explosion.
  • Easy to Make: Seriously, these bars are so simple to whip up. No fancy equipment or complicated techniques required.
  • Great for Any Occasion: Whether it’s a picnic, a potluck, or just a sweet treat after dinner, these bars are always a hit.
  • Freezer-Friendly: Make a batch ahead of time and freeze for later. They thaw beautifully!

Ingredients for Gluten-Free Rhubarb Bars

Here’s what you’ll need to create these delightful bars. I’ve included some notes on substitutions too, just in case you need them.

  • ‘3/4 cup old-fashioned oats, gluten-free (80 grams)’
  • ‘1 cup oat flour (100 grams)’
  • ‘1/2 cup packed brown sugar’
  • ‘1 tablespoon tapioca starch (or cornstarch)’
  • ‘1 1/4 teaspoons baking powder’
  • ‘1/4 teaspoon sea salt’
  • ‘1/4 teaspoon ground cinnamon’
  • ‘1/2 cup melted vegetable shortening (such as nutiva coconut/palm oil spread, or butter)’
  • ‘1 1/4 cups raspberry rhubarb compote’
  • ‘2 cups chopped rhubarb, frozen or fresh (225 grams)’
  • ‘1 1/4 cups raspberries, organic and frozen or fresh (170 grams)’
  • ‘1/3 cup plus 1 tablespoon raw cane sugar’
  • ‘Zest and juice of one lemon’
  • ‘3 teaspoons cornstarch or tapioca starch’
  • ‘1/2 teaspoon vanilla essence’

How to Make Gluten-Free Rhubarb Bars: Step-by-Step

Alright, let’s get down to the nitty-gritty. Here’s how to make these amazing gluten-free rhubarb bars. Don’t worry, I’ll walk you through every step.

  1. Prepare the Base: Preheat your oven to 375°F (190°C). Line an 8×8 inch baking pan with parchment paper, leaving some overhang for easy removal. This is key; parchment paper makes everything easier.
  2. Make the Crust: In a large bowl, combine the gluten-free oats, oat flour, brown sugar, tapioca starch, baking powder, sea salt, and cinnamon. Stir well to combine. Add the melted vegetable shortening (or butter) and mix until the mixture resembles coarse crumbs. Press about two-thirds of the mixture into the prepared baking pan to form the crust.
  3. Prepare the Rhubarb Filling: In another bowl, combine the chopped rhubarb, raspberries, raw cane sugar, lemon zest, lemon juice, cornstarch (or tapioca starch), and vanilla essence. Mix gently until everything is well combined.
  4. Assemble the Bars: Pour the rhubarb filling over the crust in the baking pan. Sprinkle the remaining crumb mixture evenly over the top.
  5. Bake: Bake for about 35-40 minutes, or until the crust is golden brown and the filling is bubbly. The baking time can vary slightly depending on your oven.
  6. Cool and Serve: Let the bars cool completely in the pan before lifting them out using the parchment paper overhang. Cut into squares and serve.

Pro Tips for Perfect Gluten-Free Rhubarb Bars

Here are a few tricks I’ve learned along the way to ensure your rhubarb bars turn out perfect every time:

  • Use Frozen Rhubarb: Frozen rhubarb works just as well as fresh, and it’s often easier to find. Plus, it helps keep the filling from being too watery.
  • Don’t Overmix the Crust: Overmixing can lead to a tough crust. Mix until just combined.
  • Let Them Cool Completely: This is crucial! The bars need to cool completely before cutting, or they’ll be too crumbly.
  • Parchment Paper is Your Friend: Seriously, don’t skip the parchment paper. It makes removing the bars from the pan a breeze.
  • Adjust Sweetness to Taste: If you prefer a sweeter bar, add a bit more sugar to the filling.

Common Mistakes to Avoid

We all make mistakes in the kitchen! Here are a few common pitfalls to watch out for when making these bars:

  • Soggy Crust: This usually happens when the filling is too wet. Make sure to use tapioca starch or cornstarch to thicken it.
  • Dry Crust: If your crust is too dry, you may have added too much flour. Make sure to measure accurately.
  • Burnt Crust: Keep an eye on the bars while they’re baking. If the crust starts to brown too quickly, tent the pan with foil.
  • Crumbly Bars: Letting the bars cool completely before cutting is key to preventing them from crumbling.

Variations on Gluten-Free Rhubarb Bars

Want to mix things up a bit? Here are a few fun variations to try:

  • Strawberry Rhubarb Bars: Add a cup of chopped strawberries to the filling for a classic combination. These bars are delicious.
  • Ginger Rhubarb Bars: Add a teaspoon of ground ginger to the crust for a warm, spicy twist.
  • Almond Rhubarb Bars: Add a quarter cup of almond flour to the crust and a splash of almond extract to the filling.
  • Lemon Rhubarb Bars: Double the lemon zest and juice for an extra zingy flavor.
  • Dairy-Free Rhubarb Bars: Use a dairy-free butter substitute in the crust.

How to Store Gluten-Free Rhubarb Bars

These bars are best stored in an airtight container at room temperature. They’ll stay fresh for up to 3 days. For longer storage, you can freeze them for up to 2 months. Just wrap them tightly in plastic wrap and then place them in a freezer bag.

Frequently Asked Questions (FAQ)

Got questions? I’ve got answers!

  • Can I use frozen rhubarb? Absolutely! Frozen rhubarb works great in this recipe.
  • Can I use regular flour instead of oat flour? I haven’t tested this recipe with regular flour, so I can’t guarantee the results. But if you’re not gluten-free, feel free to experiment!
  • Can I make these bars ahead of time? Yes! These bars are perfect for making ahead of time. Just store them in an airtight container until you’re ready to serve.
  • Are these bars vegan? As written, no. But you can easily make them vegan by using a vegan butter substitute and ensuring your sugar is vegan-friendly.
  • Can I add nuts to the crust? Sure! Add about a half cup of chopped nuts to the crust mixture for extra flavor and texture.

Serving Suggestions for Gluten-Free Rhubarb Bars

These bars are delicious on their own, but here are a few ideas for serving them:

  • With a Scoop of Ice Cream: Vanilla ice cream is a classic pairing.
  • With a Dollop of Whipped Cream: A little whipped cream adds a touch of elegance.
  • With a Cup of Tea or Coffee: These bars are perfect for an afternoon treat.
  • Dusted with Powdered Sugar: A simple dusting of powdered sugar makes them look extra fancy.

More Recipes You’ll Love

If you loved these rhubarb bars, here are a few other recipes you might enjoy:

I hope you enjoy these easy gluten-free rhubarb bars as much as I do! Happy baking, y’all!

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