Soft rhubarb bars with an oatmeal crumb base and a sweet-tangy cooked rhubarb filling are a delightful treat. These Amish Oatmeal Rhubarb Bars (with crumb topping) are perfect for any occasion, from family gatherings to potlucks. Their unique blend of textures and flavors makes them stand out as a simple yet delicious dessert that everyone will love.
Why You’ll Love This Recipe
- Easy to Make: With straightforward steps, you can whip these bars up in no time, making them perfect for busy bakers.
- Flavorful Combination: The sweet-tangy rhubarb filling pairs beautifully with the crunchy oatmeal topping, ensuring a delightful bite every time.
- Versatile Dessert: Great for any occasion, these bars can be served warm or cold and are ideal for both casual snacks and special events.
- Crowd-Pleaser: People of all ages enjoy these bars, making them a hit at parties and gatherings.
- Make-Ahead Friendly: These bars can be made in advance, allowing you to prepare for events without stress.
Tools and Preparation
To create these delicious Amish Oatmeal Rhubarb Bars (with crumb topping), you’ll need some essential kitchen tools.
Essential Tools and Equipment
- Mixing bowl
- 2-quart saucepan
- Baking dish (8×8 inches)
- Measuring cups and spoons
- Spoon or spatula
Importance of Each Tool
- Mixing bowl: A sturdy bowl helps combine the ingredients efficiently.
- Baking dish: The right size ensures even baking and proper texture.
- Measuring cups and spoons: Accurate measurements are key to achieving the perfect balance of flavors.
Ingredients
For the Crumb Topping/Base
- 1 cup old fashioned rolled oats
- 3/4 cup all-purpose flour
- 1/2 cup butter, softened
- 1/8 teaspoon salt
- 1/8 teaspoon baking soda
- 1/2 cup brown sugar, packed
For the Rhubarb Filling
- 1 1/2 cups chopped rhubarb
- 3/4 cup granulated sugar
- 1 tablespoon cornstarch, heaping
- 2 tablespoons water
- 1/2 teaspoon vanilla extract
How to Make Amish Oatmeal Rhubarb Bars (with crumb topping)
Step 1: Preheat the Oven
Preheat your oven to 350°F.
Step 2: Prepare the Crumb Base
In a medium mixing bowl:
1. Combine the following ingredients:
Old fashioned rolled oats
All-purpose flour
Softened butter
Salt
Baking soda
Brown sugar
Mix until coarse crumbs form.
Step 3: Make the Rhubarb Filling
In a 2-quart saucepan:
1. Combine:
Chopped rhubarb
Granulated sugar
Cornstarch
Water
- Simmer over medium-high heat for 5-10 minutes, stirring frequently until the rhubarb softens and mixture becomes clear.
- Remove from heat and stir in vanilla extract. Allow to cool for 10 minutes until slightly thickened.
Step 4: Assemble the Bars
- Press all but 2/3 cup of the oatmeal crumbs into the bottom of a greased or parchment-lined 8×8-inch baking dish, ensuring no cracks remain.
- Pour the warm rhubarb filling over the crumb base.
- Sprinkle the remaining crumbs evenly over the top.
Step 5: Bake
Bake in the preheated oven for 30-40 minutes or until golden on the bottom and filling is set.
Step 6: Cool and Serve
Cool completely before cutting into bars. Enjoy your freshly baked Amish Oatmeal Rhubarb Bars (with crumb topping) as a delightful dessert!
How to Serve Amish Oatmeal Rhubarb Bars (with crumb topping)
Amish Oatmeal Rhubarb Bars are delightful treats that can be enjoyed in various ways. Whether you’re serving them at a gathering or enjoying them at home, these bars can be paired with many accompaniments to elevate their taste.
With Whipped Cream
- Serve warm or chilled bars topped with a dollop of freshly whipped cream for added creaminess and sweetness.
A La Mode
- Add a scoop of vanilla ice cream on top of the warm bars for a delightful contrast of temperatures and textures.
With Fresh Berries
- Serve alongside fresh strawberries or raspberries for a burst of color and an extra layer of fruity flavor.
Drizzled with Caramel Sauce
- Pour some caramel sauce over the top before serving for a sweet, gooey finish that complements the tangy rhubarb filling.
Accompanied by Coffee or Tea
- Enjoy these bars with a hot cup of coffee or tea as a perfect afternoon snack or dessert.

How to Perfect Amish Oatmeal Rhubarb Bars (with crumb topping)
To achieve the best results with your Amish Oatmeal Rhubarb Bars, consider these helpful tips that will enhance both flavor and texture.
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Use Fresh Rhubarb – Fresh rhubarb will give you the best flavor and texture compared to frozen. Look for firm, vibrant stalks.
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Don’t Overmix the Crumb Base – Mix just until coarse crumbs form. Overmixing can lead to dense bars instead of light, crumbly ones.
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Let the Filling Cool – Allowing the rhubarb filling to cool slightly before pouring it onto the crust helps maintain its structure and prevents sogginess.
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Press Firmly – Ensure that you press down firmly on the crumb base in the baking dish. This will help prevent cracks in your bars.
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Use Parchment Paper – Lining your baking dish with parchment paper makes it easier to lift out the bars once they’ve cooled, ensuring even cutting.
Best Side Dishes for Amish Oatmeal Rhubarb Bars (with crumb topping)
Pairing side dishes with your Amish Oatmeal Rhubarb Bars can enhance your dessert experience. Here are some great options to consider:
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Vanilla Ice Cream – A classic pairing that adds creaminess and balances the tartness of rhubarb.
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Greek Yogurt – A healthier option that provides a tangy contrast; serve plain or sweetened with honey for extra flavor.
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Fruit Salad – A refreshing mix of seasonal fruits complements the sweetness of the bars while adding freshness.
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Cheese Platter – Include mild cheeses like brie or gouda for a savory counterpoint to the sweet rhubarb flavors.
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Coffee Cake – Another delicious baked treat that pairs well with rhubarb flavors, perfect for brunch gatherings.
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Lemonade – The tartness from lemonade offers a delightful contrast when enjoying your sweet bars, especially in summer.
Common Mistakes to Avoid
Making Amish Oatmeal Rhubarb Bars (with crumb topping) can be straightforward, but some common mistakes can ruin your dessert. Here are a few to watch out for:
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Ignoring the rhubarb prep: Not chopping the rhubarb into even pieces can lead to uneven cooking. Always chop rhubarb uniformly for consistent texture and flavor.
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Skipping the cooling step: If you pour the filling over the crumb base while it’s still hot, it can make the crust soggy. Allow the filling to cool slightly before combining.
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Not pressing crumbs firmly: Failing to press down the crumb base can result in cracks. Make sure to press it firmly into the baking dish for a sturdy bar.
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Overbaking or underbaking: Baking times vary by oven. Keep an eye on your bars during the last few minutes of baking to ensure they reach that perfect golden color.
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Forgetting about storage: Improper storage can affect freshness. Always store your bars in an airtight container to maintain their quality.
Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container.
- Keep in the fridge for up to 5 days.
- Ensure bars are completely cooled before sealing.
Freezing Amish Oatmeal Rhubarb Bars (with crumb topping)
- Wrap individual bars in plastic wrap or foil.
- Place them in a freezer-safe container or bag.
- Freeze for up to 3 months for best quality.
Reheating Amish Oatmeal Rhubarb Bars (with crumb topping)
- Oven: Preheat to 350°F and warm bars for about 10-15 minutes until heated through.
- Microwave: Heat individual bars on medium power for 30-60 seconds until warm.
- Stovetop: Place bars in a pan over low heat, cover with a lid, and warm for about 5 minutes.
Frequently Asked Questions
Here are some common questions regarding Amish Oatmeal Rhubarb Bars (with crumb topping).
Can I use frozen rhubarb for this recipe?
Yes, you can use frozen rhubarb! Just thaw and drain excess moisture before using it in your filling.
What’s the best way to serve these bars?
These bars taste great on their own, but you can enhance them with whipped cream or vanilla ice cream for added indulgence.
How do I know when my bars are done baking?
Look for a golden brown color on top and a set filling. You can also insert a toothpick; it should come out clean when they’re ready.
Can I customize the toppings?
Absolutely! Feel free to add nuts or spices like cinnamon to the crumb topping for extra flavor and texture.
Final Thoughts
Amish Oatmeal Rhubarb Bars (with crumb topping) are a delightful blend of sweet and tart flavors, making them a perfect dessert choice. Their versatility allows you to customize ingredients according to your preference, whether adding spices or different fruits. Give this recipe a try; it’s sure to become a family favorite!
Amish Oatmeal Rhubarb Bars (with crumb topping)
- Total Time: 55 minutes
- Yield: Makes approximately 12 bars 1x
Description
Amish Oatmeal Rhubarb Bars with crumb topping are a delicious blend of sweet and tangy flavors, making them an irresistible dessert. The soft, cooked rhubarb filling complements the crunchy oatmeal base, creating a delightful texture that appeals to all ages. Perfect for family gatherings, potlucks, or just a cozy afternoon treat, these bars are easy to make and can be enjoyed warm or chilled. Serve them with whipped cream or vanilla ice cream for an extra indulgence. With their make-ahead convenience, these bars will quickly become a favorite in your dessert repertoire.
Ingredients
- 1 cup old-fashioned rolled oats
- 3/4 cup all-purpose flour
- 1/2 cup butter, softened
- 1/8 teaspoon salt
- 1/8 teaspoon baking soda
- 1/2 cup brown sugar
- 1 1/2 cups chopped rhubarb
- 3/4 cup granulated sugar
- 1 tablespoon cornstarch
- 2 tablespoons water
- 1/2 teaspoon vanilla extract
Instructions
- Preheat your oven to 350°F (175°C).
- In a mixing bowl, combine oats, flour, softened butter, salt, baking soda, and brown sugar until coarse crumbs form.
- In a saucepan over medium heat, mix rhubarb, granulated sugar, cornstarch, and water. Simmer until the mixture thickens and becomes clear, about 5-10 minutes.
- Press most of the crumb mixture into a greased 8×8-inch baking dish. Pour the warm rhubarb filling over it and sprinkle the remaining crumbs on top.
- Bake for 30-40 minutes until golden on the edges and set in the center.
- Allow to cool completely before cutting into bars.
- Prep Time: 20 minutes
- Cook Time: 35 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 bar (approx. 60g)
- Calories: 180
- Sugar: 10g
- Sodium: 60mg
- Fat: 9g
- Saturated Fat: 4g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 23g
- Fiber: 2g
- Protein: 2g
- Cholesterol: 15mg





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