Soft rhubarb bars with an oatmeal crumb base and a sweet-tangy cooked rhubarb filling are a true delight. These Amish Oatmeal Rhubarb Bars (with crumb topping) are perfect for any occasion, whether it’s a family gathering, a picnic, or just a cozy dessert at home. The unique combination of textures and flavors makes these bars stand out, offering a satisfying treat that balances sweetness and tartness.
Why You’ll Love This Recipe
- Easy to Make: This recipe is simple enough for beginners, requiring minimal preparation and cooking time.
- Delicious Flavor: The sweet-tangy rhubarb filling pairs perfectly with the crumb topping, creating a delightful taste experience.
- Versatile Dessert: These bars can be enjoyed warm, at room temperature, or even chilled; perfect for any season.
- Nutritious Ingredients: Made with wholesome oats and fresh rhubarb, these bars provide a tasty way to incorporate fruit into your diet.
- Perfect for Sharing: Cut into squares, they make excellent treats to share at potlucks or gatherings.
Tools and Preparation
To create the best Amish Oatmeal Rhubarb Bars (with crumb topping), having the right tools will make the process smoother and more enjoyable.
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 spacious bowl allows for easy mixing of ingredients without spilling.
- Baking dish: An 8×8 inch baking dish is ideal for achieving the perfect thickness in your bars.
Ingredients
Soft rhubarb bars with an oatmeal crumb base and a sweet-tangy cooked rhubarb filling. Perfectly balanced with texture and flavor, making a simple yet delicious dessert.
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
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. This ensures that your bars bake evenly.
Step 2: Prepare the Crumb Mixture
In a medium mixing bowl:
1. Combine the old fashioned rolled oats, all-purpose flour, softened butter, salt, baking soda, and brown sugar.
2. Mix until coarse crumbs form.
Step 3: Cook the Rhubarb Filling
In a 2-quart saucepan:
1. Combine the chopped rhubarb, granulated sugar, cornstarch, and water.
2. Simmer over medium-high heat for about 5-10 minutes. Stir frequently until the rhubarb softens and the mixture becomes clear.
3. Remove from heat and stir in the vanilla extract. Let cool for about 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. Ensure there are no cracks.
- Pour the warm rhubarb filling over this crumb base.
- Sprinkle the remaining crumbs evenly over the top.
Step 5: Bake
Bake in your preheated oven for about 30-40 minutes. Look for a golden color on the bottom while ensuring that both filling and topping are set.
Step 6: Cool and Serve
Allow cooling completely before cutting into bars. Enjoy your delicious Amish Oatmeal Rhubarb Bars (with crumb topping)!
How to Serve Amish Oatmeal Rhubarb Bars (with crumb topping)
Amish Oatmeal Rhubarb Bars are a delightful treat that can be enjoyed in various ways. Whether served as a dessert or a sweet snack, these bars are versatile and perfect for any occasion.
With a Dollop of Whipped Cream
- Whipped cream adds a light and airy touch to the rich flavor of the bars.
Paired with Vanilla Ice Cream
- The warm bars contrast beautifully with cold vanilla ice cream, creating a comforting dessert experience.
Accompanied by Fresh Berries
- Fresh berries provide a burst of flavor and color, enhancing the sweetness of the rhubarb filling.
Served As Part of a Brunch Spread
- These bars make an excellent addition to any brunch table, offering guests a sweet option alongside savory dishes.
With Hot Tea or Coffee
- Enjoying these bars with a hot beverage enhances their flavors while making for a cozy afternoon snack.
Drizzled with Icing
- A simple icing made from powdered sugar and milk can elevate these bars further, adding sweetness and visual appeal.

How to Perfect Amish Oatmeal Rhubarb Bars (with crumb topping)
To ensure your Amish Oatmeal Rhubarb Bars turn out perfectly every time, follow these helpful tips.
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Use Fresh Rhubarb: Fresh rhubarb provides the best flavor and texture. If using frozen rhubarb, ensure it’s fully thawed and drained.
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Press Crumbs Firmly: Press the crumb base firmly into the baking dish to avoid cracks. This helps create a sturdy foundation for the filling.
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Cool Before Cutting: Allow the bars to cool completely before cutting. This helps them set and makes slicing easier without falling apart.
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Adjust Sweetness: Depending on your taste preference, feel free to adjust the sugar in both the filling and crumb mixture for a sweeter or more tart bar.
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Experiment with Spices: Adding spices like cinnamon or nutmeg can enhance the flavor profile of both the crumb topping and rhubarb filling.
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Store Properly: Keep leftover bars in an airtight container at room temperature for up to three days or refrigerate for longer freshness.
Best Side Dishes for Amish Oatmeal Rhubarb Bars (with crumb topping)
When serving Amish Oatmeal Rhubarb Bars, pairing them with some side dishes can create a well-rounded meal or snack experience. Here are some great options:
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Greek Yogurt: A small bowl of Greek yogurt adds creaminess and tanginess that complements the sweet-tart flavor of the bars.
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Fruit Salad: A refreshing fruit salad brings brightness and balance, making it a perfect side for this rich dessert.
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Cheese Platter: A selection of mild cheeses pairs nicely with sweet desserts, providing contrast in flavors and textures.
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Savory Muffins: Serve with savory muffins like cheese or herb varieties for an interesting twist alongside sweet treats.
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Granola Parfait: Layering granola with yogurt and fruit creates a delightful parfait that contrasts well with the dense texture of the bars.
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Mixed Nuts: A bowl of mixed nuts offers crunchiness and protein, balancing out the sweetness of your dessert choice.
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Chilled Lemonade: The tartness from lemonade provides refreshment that cuts through the richness of rhubarb bars nicely.
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Herbal Tea: A calming cup of herbal tea can enhance your dessert experience while providing soothing qualities after indulging in sweets.
Common Mistakes to Avoid
When making Amish Oatmeal Rhubarb Bars (with crumb topping), it’s essential to avoid common pitfalls that can affect the final result.
- Skipping the cooling step: Allowing the rhubarb filling to cool slightly helps it thicken. Skipping this can lead to a runny filling that doesn’t set properly.
- Not pressing crumbs firmly: If you don’t press down the crumb base adequately, it may crumble apart when served. Be sure to pack it tightly into the baking dish for better structure.
- Overbaking the bars: Keeping an eye on baking time is crucial. Overbaked bars can become dry and lose their delicious texture. Aim for a golden top and set filling.
- Using fresh rhubarb without prep: Fresh rhubarb should be chopped and possibly salted to remove excess moisture. This step prevents a watery filling and enhances flavor.
- Neglecting to measure ingredients accurately: Baking requires precision. Use measuring cups and spoons for accurate ingredient amounts, especially for sugar and flour.
Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container in the refrigerator.
- They will stay fresh for up to 5 days.
Freezing Amish Oatmeal Rhubarb Bars (with crumb topping)
- Wrap bars tightly in plastic wrap and then aluminum foil.
- They can be frozen for up to 3 months.
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 a microwave-safe plate for 20-30 seconds or until warm.
- Stovetop: Place bars in a skillet over low heat, cover, and warm for about 5 minutes.
Frequently Asked Questions
Can I use frozen rhubarb for these bars?
Yes, frozen rhubarb works well! Just thaw it completely and drain excess moisture before using it in your filling.
How do I know when my bars are done baking?
Look for a golden color on top and check that the filling is set. You can also insert a toothpick; it should come out clean.
What can I substitute for granulated sugar?
You can use coconut sugar or maple syrup as alternatives, but adjust quantities accordingly since they may have different sweetness levels.
Can I add nuts or other fruits?
Absolutely! Feel free to mix in chopped nuts or berries along with the rhubarb for added flavor and texture.
Final Thoughts
Amish Oatmeal Rhubarb Bars (with crumb topping) offer a delightful combination of sweet and tart flavors, making them perfect for any occasion. Their versatility allows you to customize with various fruits or toppings based on your preferences. Give this recipe a try, and enjoy a delicious dessert that is sure to impress!
Amish Oatmeal Rhubarb Bars with Crumb Topping
- Total Time: 50 minutes
- Yield: Serves approximately 9 bars 1x
Description
Amish Oatmeal Rhubarb Bars with Crumb Topping are a delightful dessert that perfectly balances sweet and tangy flavors. With a soft oatmeal crumb base and a luscious rhubarb filling, these bars are not only easy to make but also incredibly satisfying. Ideal for any occasion—from family gatherings to cozy nights at home—these bars are versatile enough to be enjoyed warm or chilled, making them the perfect treat year-round. The wholesome ingredients, including fresh rhubarb and rolled oats, provide a nutritious twist on a classic dessert. Whether you serve them with whipped cream or vanilla ice cream, they are sure to impress your friends and family.
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 oven to 350°F.
- In a mixing bowl, combine rolled oats, flour, softened butter, salt, baking soda, and brown sugar until coarse crumbs form.
- In a saucepan over medium-high heat, cook chopped rhubarb with granulated sugar, cornstarch, and water until soft (5-10 minutes). Stir in vanilla extract and let cool.
- Press about two-thirds of the crumb mixture into an 8×8-inch greased baking dish. Add the cooled rhubarb filling on top and sprinkle remaining crumbs over it.
- Bake for 30-40 minutes until golden brown. Cool completely before cutting into squares.
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 bar (60g)
- Calories: 220
- Sugar: 15g
- Sodium: 75mg
- Fat: 10g
- Saturated Fat: 6g
- Unsaturated Fat: 3g
- Trans Fat: 0g
- Carbohydrates: 32g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 25mg





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