Delicious Oatmeal Rhubarb Bars Recipe – Easy & Tasty Recipe
If you’ve never experienced the lip-smacking combo of tart rhubarb and cozy oats, let me introduce you to my all-time spring favorite: the Delicious Oatmeal Rhubarb Bars Recipe – Easy & Tasty. These bars are bursting with tangy rhubarb tucked between tender, buttery oat layers, and the whole thing comes together with the simplest ingredients. Whether you’re looking for a nostalgic bake sale treat or just need a fuss-free dessert, these bars absolutely deliver that “just one more piece” feeling every single time.

Ingredients You’ll Need
The magic of these bars lies in their simplicity! Each ingredient plays a vital role, from creating the perfect chewy texture to balancing sweetness and providing that pop of tart color. Grab these pantry staples—you’ll be amazed at how they shine together.
- Rolled oats: Old-fashioned oats bring a hearty texture that’s just unbeatable in the crumble layers.
- All-purpose flour: Forms the structure and helps hold the bars together while keeping things light.
- Brown sugar (dark): Adds deep, rich sweetness and a beautiful caramel note that pairs perfectly with rhubarb.
- Chopped rhubarb (fresh or frozen): The star of the show, bringing a vibrant, tangy bite—no need to thaw if using frozen!
- Unsalted butter (melted): Makes the oat mixture irresistibly moist and gives the bars a buttery finish.
- Baking powder: Ensures a slight lift and lightness in your crumb layers.
- Cinnamon: Warm spice that rounds out the flavors—don’t skip it!
- Salt: Enhances all the other flavors and keeps the bars from tasting flat.
- Water (if using fresh rhubarb): A splash keeps the fresh rhubarb juicy so it softens and melds beautifully in the oven.
How to Make Delicious Oatmeal Rhubarb Bars Recipe – Easy & Tasty
Step 1: Prep Your Pan and Oven
Start by heating your oven to 350°F (175°C). For easy bar removal later, line a 9×13 inch pan with parchment paper or lightly grease every corner—trust me, those gooey edges are worth saving!
Step 2: Mix Your Dry Ingredients
In a large bowl, combine the rolled oats, flour, brown sugar, baking powder, cinnamon, and salt. Mixing them all together evenly now means every bite will have the perfect balance of sweetness, spice, and satisfying chewiness.
Step 3: Add Melted Butter
Pour the warm, melted butter over your oat mixture and stir until everything is moist and crumbly. Don’t worry if it feels like wet sand—this is what’s going to give you those luscious, buttery layers.
Step 4: Create the Base Layer
Take about two-thirds of your buttery oat mixture and press it firmly into the bottom of your prepared pan, making a tight, even foundation. Don’t skimp here; you want a nice base that will hold up when sliced.
Step 5: Prepare and Add the Rhubarb
If using fresh rhubarb, toss it with the water to make sure it bakes up juicy and tender. Scatter your rhubarb evenly across the oat base—this pop of color is as pretty as it is delicious!
Step 6: Sprinkle the Remaining Crumb Topping
Take the rest of your oat mixture and sprinkle it over the rhubarb, making sure you get into every nook and cranny. This top layer will bake up crisp and golden, sealing all those lovely juices inside.
Step 7: Bake to Perfection
Slide your pan into the oven and bake for about 30–35 minutes, or until the top is beautifully golden brown. Your kitchen will smell absolutely amazing, and the bars will bubble invitingly at the edges.
Step 8: Cool and Slice
Let the bars cool completely right in the pan. Patience pays off here—once set, the bars slice into neat squares and hold together like a dream for serving or packing up for a picnic.
How to Serve Delicious Oatmeal Rhubarb Bars Recipe – Easy & Tasty

Garnishes
A dusting of powdered sugar adds a pretty, delicate finish and just a touch of extra sweetness. If you’re feeling extra fancy, a dollop of whipped cream or a scoop of creamy vanilla ice cream turns these bars into a stunning dessert plate.
Side Dishes
To round out your snack or dessert table, serve these bars with a fresh fruit salad, some tangy Greek yogurt, or even a drizzle of honey. They’re also fantastic alongside a hot mug of coffee or an iced latte for a sweet afternoon pick-me-up.
Creative Ways to Present
Cut the bars into triangles or diamonds for an elegant twist, or stack them in rustic piles on a wooden platter for easy sharing at a potluck. Wrap individual squares in parchment for grab-and-go lunchbox treats—the pink tinge from the rhubarb always adds a bit of cheer!
Make Ahead and Storage
Storing Leftovers
Keep any leftover bars in an airtight container at room temperature for up to 2 days—though they rarely last that long! For longer freshness, stash them in the fridge, where they’ll hold their texture and flavor for up to a week.
Freezing
The Delicious Oatmeal Rhubarb Bars Recipe – Easy & Tasty is perfect for freezing. Simply layer cooled bars with parchment between each layer in a freezer-safe container, and freeze for up to 2 months. They thaw beautifully—just bring them to room temperature or warm briefly.
Reheating
If you love that fresh-from-the-oven warmth, just pop a bar in the microwave for about 10–15 seconds. Or, reheat a batch in the oven at 300°F (150°C) for 5–8 minutes. This revives their buttery texture and makes the rhubarb filling sing.
FAQs
Can I use frozen rhubarb in this Delicious Oatmeal Rhubarb Bars Recipe – Easy & Tasty?
Absolutely! Frozen rhubarb is a lifesaver outside of rhubarb season. Just measure it straight from the freezer—no need to thaw, and it bakes up perfectly tender.
Can I substitute another fruit for rhubarb?
Yes, you can definitely experiment! Strawberries make a lovely partner, or try blueberries for a juicy twist. Just aim for about 1 cup of chopped fruit so the moisture level stays right.
How do I keep the bars from falling apart?
Let the bars cool completely in the pan before slicing. It’s tempting to dig in early, but cooling helps the oats and butter firm up, giving you neat squares every time.
Is it possible to make this Delicious Oatmeal Rhubarb Bars Recipe – Easy & Tasty gluten-free?
Yes! Swap in your favorite gluten-free flour blend for the all-purpose flour, and be sure your oats are certified gluten-free. The bars will still be satisfyingly chewy and delicious.
What’s the best way to cut clean squares?
Use a sharp knife and gently wipe it clean between slices for professional-looking bars. If you chill the pan for an hour after cooling, cutting is even easier with minimal crumbs.
Final Thoughts
There you have it—a cozy, irresistible bake that never fails to wow! Give the Delicious Oatmeal Rhubarb Bars Recipe – Easy & Tasty a spot in your kitchen this season and see just how quickly they disappear. Don’t forget to share a pan with friends—they’ll thank you, and you’ll love having this cheerful bite of spring to brighten any day.
PrintDelicious Oatmeal Rhubarb Bars Recipe – Easy & Tasty Recipe
These Delicious Oatmeal Rhubarb Bars are a perfect balance of sweet and tangy, with a buttery oatmeal base and a layer of juicy rhubarb. Easy to make and even easier to enjoy, these bars are a delightful treat for any occasion.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: 12 bars 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Ingredients
Oatmeal Base:
- 2 cups rolled oats (old-fashioned)
- 1 cup all-purpose flour
- 1 cup brown sugar (dark brown)
- 1/2 teaspoon baking powder
- 1/2 teaspoon cinnamon
- 1/4 teaspoon salt
- 1/2 cup unsalted butter (melted)
Rhubarb Filling:
- 1 cup chopped rhubarb (fresh or frozen)
- 1/2 cup water (if using fresh rhubarb)
Instructions
- Preheat Oven: Preheat oven to 350°F (175°C) and prepare a 9×13 inch baking pan.
- Mix Dry Ingredients: In a large bowl, mix oats, flour, brown sugar, baking powder, cinnamon, and salt.
- Add Butter: Pour in melted butter and mix until crumbly.
- Layer Base: Press two-thirds of the mixture into the pan for the base.
- Add Rhubarb: If using fresh rhubarb, toss with water and layer over the base.
- Add Topping: Sprinkle remaining mixture over the rhubarb.
- Bake: Bake for 30-35 minutes until golden brown.
- Cool and Serve: Allow to cool before slicing into squares.
Notes
- You can adjust the sweetness by using more or less sugar based on your preference.
- These bars are best enjoyed fresh but can be stored in an airtight container for a few days.
Nutrition
- Serving Size: 1 bar
- Calories: 240
- Sugar: 15g
- Sodium: 110mg
- Fat: 9g
- Saturated Fat: 5g
- Unsaturated Fat: 3g
- Trans Fat: 0g
- Carbohydrates: 38g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 20mg
Keywords: Oatmeal Rhubarb Bars, Rhubarb Dessert, Oat Bars Recipe