If you’re craving a comforting dessert that perfectly balances sweet and tart flavors, these Delicious Amish Oatmeal Rhubarb Bars are exactly what you need. With a buttery oat crumble, a vibrant rhubarb filling, and a soft yet slightly crisp texture, this easy recipe is ideal for a quick breakfast, healthy snack, or simple dessert idea. You’ll find these bars are a delightful way to showcase seasonal rhubarb, marrying it beautifully with oats and sugar for a perfect homemade treat.
Imagine biting into a freshly baked oatmeal rhubarb bar. The tartness of the rhubarb cuts through the sweetness of the crumble, creating a combination that is not only satisfying but also wholesome. Perfectly portioned, they make an excellent addition to any gathering, picnic, or simply as a treat for yourself. With just a handful of ingredients—many of which you likely have on hand—making these bars is both simple and rewarding.
Why You’ll Love This Delicious Amish Oatmeal Rhubarb Bars
- Delicious Flavor Balance: The sweet and tangy mix of fresh rhubarb and crispy oat crumble.
- Easy to Make: A simple recipe that requires minimal ingredients and prep time.
- Versatile Treat: Perfect for breakfast, snacks, or dessert.
- Healthy Option: Made with wholesome ingredients, perfect for a guilt-free indulgence.
- Great for Sharing: Slice into bars that are ideal for sharing with friends and family.
Preparation Phase & Tools to Use
Before diving into baking these delicious oatmeal rhubarb bars, it’s important to prepare your kitchen space to ensure a smooth cooking experience. Start by gathering all your ingredients so you won’t have to stop midway through. You’ll need a mixing bowl for combining the ingredients, a baking pan (preferably 9×9 inches), and parchment paper to line the pan for easy removal after baking.
Additionally, a sharp knife will be handy for chopping the rhubarb into small pieces and a measuring cup for precise ingredient measurements. Having a spatula or wooden spoon will also help when mixing everything together and spreading the filling. Lastly, preheating the oven ahead of time to 350°F (175°C) will ensure that your bars bake evenly and attain that golden-brown finish.

Ingredients
- 1 1/2 cups chopped rhubarb
- 3/4 cup granulated sugar
- 2 tablespoons cornstarch
- 1 cup all-purpose flour
- 1 cup old-fashioned rolled oats
- 1/2 cup brown sugar
- 1/2 cup unsalted butter, softened
- 1 teaspoon vanilla extract
- 1/4 teaspoon salt
- 1/2 teaspoon baking soda
Instructions
Step 1: Prepare the Oven and Pan
Start by preheating your oven to 350°F (175°C). While the oven warms up, take a 9×9-inch baking pan and line it with parchment paper—this step is crucial for making it easy to remove the bars once they’ve cooled.
Step 2: Prepare the Rhubarb Filling
In a bowl, take your chopped rhubarb and mix it with 3/4 cup of granulated sugar and 2 tablespoons of cornstarch. This mixture needs to sit for a few minutes, allowing the sugar to draw out the juices from the rhubarb, which not only enhances the flavor but also creates the perfect consistency once baked.
Step 3: Make the Crumble Mixture
In another bowl, combine 1 cup of all-purpose flour, 1 cup of old-fashioned rolled oats, 1/2 cup of brown sugar, 1/4 teaspoon of salt, and 1/2 teaspoon of baking soda. Stir these dry ingredients together until well-mixed. Next, cut in the softened butter into the mixture, along with 1 teaspoon of vanilla extract, until it resembles coarse crumbs.
Step 4: Assemble the Base
Take two-thirds of the crumble mixture and press it firmly into the bottom of the lined baking pan. This layer acts as the base for your bars and should be compact to hold the rhubarb filling properly.
Step 5: Add the Rhubarb Layer
Next, spread the prepared rhubarb mixture evenly over the crumbly base. Make sure to cover it well, ensuring every bite has that delightful filling.
Step 6: Top with Remaining Crumble
Finally, sprinkle the remaining crumble mixture over the rhubarb filling. This top layer adds the perfect crispy dimension to the bars and seals in the juicy rhubarb.
Step 7: Bake & Cool
Place the pan in your preheated oven and bake for 40 to 45 minutes, or until the top is golden brown and the rhubarb is bubbling slightly. Afterwards, take the bars out of the oven and allow them to cool in the pan. Once cool, lift them out using the parchment paper, slice, and serve!

Variations
- Protein: Add a scoop of protein powder to the crumble mixture for added nutrition.
- Vegetables: Try swapping rhubarb for strawberries, blueberries, or apples for a different flavor profile.
- Spices: Sprinkle some cinnamon or nutmeg into the crumble for a warm, aromatic twist.
Cooking Notes
- Ensure the rhubarb is fresh and firm for the best texture and flavor.
- For a sweeter bar, you can adjust the sugar level slightly based on your preference.
Serving Suggestions
- Serve warm with a scoop of vanilla ice cream for a delightful dessert.
- Pair with a cup of coffee or tea for a cozy afternoon snack.
Tips
- Let the bars cool completely before cutting, as this will help them retain their shape.
- Store any leftovers in an airtight container in the refrigerator for up to a week.
Prep Time, Cook Time, Total Time
- Prep Time: 20 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour 5 minutes
Nutritional Information
- Calories: 210 per bar
- Protein: 2g
- Sodium: 150mg
FAQs
Can I use frozen rhubarb for this recipe?
Yes, you can use frozen rhubarb; just make sure to thaw and drain any excess liquid before adding it to the mixture.
How do I store the leftover bars?
Keep the bars in an airtight container in the refrigerator for up to a week to maintain freshness.
Can I make these bars gluten-free?
Absolutely! Substitute the all-purpose flour with a gluten-free flour blend and ensure your oats are certified gluten-free.
Can I add nuts to the crumble mixture?
Yes, feel free to add chopped nuts like walnuts or pecans for additional crunch and flavor.
Conclusion
In conclusion, these Delicious Amish Oatmeal Rhubarb Bars are a fantastic way to enjoy the unique flavor of rhubarb while indulging in a sweet treat. Their balance of flavors—sweet from the sugar and tart from the rhubarb—make them irresistible. Whether you’re enjoying them as a breakfast boost or a satisfying dessert, these bars are sure to please both your palate and your waistline. Don’t hesitate to experiment with variations, and make sure to share your thoughts and experiences in the comments. Happy baking!
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Delicious Amish Oatmeal Rhubarb Bars
- Total Time: 1 hour 5 minutes
- Yield: 12 bars 1x
Description
If you’re craving a comforting dessert that perfectly balances sweet and tart flavors, these Delicious Amish Oatmeal Rhubarb Bars are exactly what you need.
Ingredients
- 1 1/2 cups chopped rhubarb
- 3/4 cup granulated sugar
- 2 tablespoons cornstarch
- 1 cup all-purpose flour
- 1 cup old-fashioned rolled oats
- 1/2 cup brown sugar
- 1/2 cup unsalted butter, softened
- 1 teaspoon vanilla extract
- 1/4 teaspoon salt
- 1/2 teaspoon baking soda
Instructions
- Start by preheating your oven to 350°F (175°C). While the oven warms up, take a 9×9-inch baking pan and line it with parchment paper—this step is crucial for making it easy to remove the bars once they’ve cooled.
- In a bowl, take your chopped rhubarb and mix it with 3/4 cup of granulated sugar and 2 tablespoons of cornstarch. This mixture needs to sit for a few minutes, allowing the sugar to draw out the juices from the rhubarb, which not only enhances the flavor but also creates the perfect consistency once baked.
- In another bowl, combine 1 cup of all-purpose flour, 1 cup of old-fashioned rolled oats, 1/2 cup of brown sugar, 1/4 teaspoon of salt, and 1/2 teaspoon of baking soda. Stir these dry ingredients together until well-mixed. Next, cut in the softened butter into the mixture, along with 1 teaspoon of vanilla extract, until it resembles coarse crumbs.
- Take two-thirds of the crumble mixture and press it firmly into the bottom of the lined baking pan. This layer acts as the base for your bars and should be compact to hold the rhubarb filling properly.
- Next, spread the prepared rhubarb mixture evenly over the crumbly base. Make sure to cover it well, ensuring every bite has that delightful filling.
- Finally, sprinkle the remaining crumble mixture over the rhubarb filling. This top layer adds the perfect crispy dimension to the bars and seals in the juicy rhubarb.
- Place the pan in your preheated oven and bake for 40 to 45 minutes, or until the top is golden brown and the rhubarb is bubbling slightly. Afterwards, take the bars out of the oven and allow them to cool in the pan. Once cool, lift them out using the parchment paper, slice, and serve!
Notes
Ensure the rhubarb is fresh and firm for the best texture and flavor. For a sweeter bar, you can adjust the sugar level slightly based on your preference.
- Prep Time: 20 minutes
- Cook Time: 45 minutes
- Category: Dessert
Nutrition
- Calories: 210 kcal
- Sodium: 150 mg
- Protein: 2 g