cinnamon rhubarb crumb bars on a rustic wooden surface

Rhubarb bars

cinnamon rhubarb crumb bars

By:

WordofMany

Published:

27 Jun 2025
cinnamon rhubarb crumb bars on a rustic wooden surface
I still remember the first time I tried rhubarb. My grandma had these huge bushes in her backyard, and she'd always whip up the most amazing pies and crumbles. The tartness of the rhubarb paired with the sweet, buttery crust was just heavenly. These Cinnamon Rhubarb Crumb Bars are my attempt to recreate that magic – with a little twist, of course!
overhead shot of rhubarb stalks being chopped on a wooden cutting board
These bars are incredibly easy to make, even if you're not a seasoned baker. The crumbly oat topping adds a delightful texture that complements the soft, tangy rhubarb filling perfectly. Plus, the hint of cinnamon brings a warm, cozy vibe that makes them irresistible. Imagine sinking your teeth into a soft, sweet, and slightly tart bar, with a hint of cinnamon dancing on your tongue. Can you picture it? I can, and I'm already drooling!
close-up shot of a freshly baked rhubarb crumb bar being lifted from a pan
Whether you're serving them for a casual brunch, a potluck with friends, or simply as a sweet treat after dinner, these Cinnamon Rhubarb Crumb Bars are guaranteed to be a hit. They’re also perfect for using up any extra rhubarb you might have lying around. You know, that rhubarb that's been sitting in your fridge, judging you for not turning it into something delicious? Well, now's your chance to redeem yourself!
a plate of rhubarb crumb bars with a scoop of vanilla ice cream on top

Required Equipments

  • Mixing Bowls
  • 9x13 inch Baking Pan
  • Measuring Cups and Spoons
  • Pastry Blender or Fork
  • Rubber Spatula
  • Parchment Paper (optional)

Cinnamon Rhubarb Crumb Bars: Frequently Asked Questions

Cinnamon Rhubarb Crumb Bars

Tangy rhubarb filling meets a buttery, cinnamon-spiced oat crumb topping in these easy-to-make Cinnamon Rhubarb Crumb Bars. A delightful treat that's perfect for any occasion!

⏳ Yield & Time

Yield: 12 servings

Preparation Time: 15 minutes

Cook Time: 40 minutes

Total Time:

🍽 Ingredients

📖 Instructions

  1. Preheat your oven to 375°F (190°C). Grease a 9x13 inch baking pan or line it with parchment paper, leaving an overhang for easy removal. This is seriously clutch – trust me, cleanup will be a breeze!
  2. In a large mixing bowl, whisk together the flour, oats, brown sugar, granulated sugar, cinnamon, and salt. Seriously, get in there and make sure everything is evenly distributed. Nobody wants a pocket of pure salt!
  3. Add the cold, cubed butter to the dry ingredients. Using a pastry blender or your fingertips, cut the butter into the mixture until it resembles coarse crumbs. This is where patience comes in handy. Don't overmix!
  4. Press about two-thirds of the crumb mixture into the prepared baking pan. Press it firmly to create a compact base. This is your crust, baby! Make it strong and sturdy.
  5. In a separate bowl, combine the chopped rhubarb, sugar, cornstarch, and lemon juice. Toss gently to coat the rhubarb evenly. I like to use my hands for this – it just feels right.
  6. Pour the rhubarb filling over the crust, spreading it out evenly. Try not to eat it all before it makes it into the pan. I dare you!
  7. Sprinkle the remaining crumb mixture evenly over the rhubarb filling. Don't be shy! The more crumbs, the merrier. (Okay, maybe not *too* many.)
  8. Bake for 35-40 minutes, or until the crust is golden brown and the filling is bubbly. Keep an eye on it – ovens can be temperamental!
  9. Let the bars cool completely in the pan before cutting into squares. This is crucial! If you cut them while they're still warm, they'll be a gooey mess (still delicious, but messy!).
  10. Lift the bars out of the pan using the parchment paper overhang (if using) and cut into squares. Serve and enjoy! Maybe with a scoop of vanilla ice cream? Just a thought…

📝 Notes

  • For a richer flavor, use brown butter in the crust. Simply melt the butter and cook until it turns a nutty brown color before chilling it slightly and cubing it.
  • Add a handful of chopped nuts (like walnuts or pecans) to the crumb topping for extra crunch.
  • Serve warm with a scoop of vanilla ice cream or a dollop of whipped cream for the ultimate treat.

🍎 Nutrition

Calories: 250 kcal

Protein: 3g

Fat: 10g

Carbohydrates: 40g

Fiber: 3g

Calcium: 50mg

"Rhubarb is such a nostalgic ingredient for me, reminding me of my grandmother's garden. These crumb bars capture that comforting, home-baked feeling perfectly."- Eleanor Vance

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