If you are looking for the perfect treat to welcome spring, look no further than my homemade strawberry rhubarb crumb bars with oats. I honestly believe these are the ultimate dessert for anyone who loves a sweet-and-tart combination. My favorite thing about this recipe is the clever crust-and-topping method. I’ve always been a fan of using the exact same dough for both the bottom layer and the crumble on top. It saves so much time in the kitchen, and it means fewer bowls to wash, which is a total win in my book!
I remember the first time I whipped these up; I was worried the crust might be too dense, but it turned out perfectly buttery and golden. The way the strawberries and rhubarb meld together while baking creates this incredible jammy filling that just begs for a scoop of vanilla ice cream. Whether I am packing them for a neighborhood picnic or just keeping them on the counter for a quick afternoon snack, these bars never last more than a day in my house. Trust me, once you master this simple technique, you will find yourself making them every single time rhubarb hits the markets.
Why You Will Love Homemade Strawberry Rhubarb Crumb Bars With Oats
You are going to fall in love with these homemade strawberry rhubarb crumb bars with oats because they are ridiculously easy to pull together. I honestly think the best part is the contrast between that buttery, golden oat crust and the bright, jammy fruit filling. The tartness of the rhubarb cuts through the sweetness of the strawberries so beautifully, making every bite feel light and fresh. Plus, using the same crumb mixture for the base and the topping is a total game-changer. It is a no-fuss way to get that perfect, professional-looking crunch without spending hours in the kitchen.
Essential Kitchen Equipment for Homemade Strawberry Rhubarb Crumb Bars With Oats
You don’t need a fancy kitchen to whip up these homemade strawberry rhubarb crumb bars with oats! I keep things simple with a few basics. Grab a sturdy 9×13 inch pan and some parchment paper to ensure they lift out easily. You will also need a couple of mixing bowls—one for the dough and one for that delicious fruit filling. A pastry cutter is my absolute favorite tool for cutting in the cold butter, though a fork works in a pinch!
Ingredients for Homemade Strawberry Rhubarb Crumb Bars With Oats
To make my favorite homemade strawberry rhubarb crumb bars with oats, you don’t need anything too exotic. Just pantry staples and some fresh, seasonal produce! For the crust and the crunchy topping, I use 3 cups all-purpose flour, 1/2 cup granulated sugar, and 1/2 cup packed light brown sugar for that lovely hint of caramel. You will also need 1 teaspoon baking powder, 1/2 teaspoon ground cinnamon, and a 1/4 teaspoon of salt to balance it all out.
The secret to that perfect, crumbly texture is definitely the 1 cup of cold, cubed unsalted butter. I also add 1 large egg, 2 teaspoons of pure vanilla extract, and 1/4 cup of milk to bring the dough together. Don’t forget the 1/3 cup of old-fashioned whole rolled oats—they add the best texture! For the filling, you will need 2 and 1/2 cups of chopped strawberries, 2 and 1/2 cups of sliced rhubarb, 1/2 cup granulated sugar, 1 tablespoon of cornstarch, and a teaspoon of fresh orange zest to make the flavors pop.
How to Make Homemade Strawberry Rhubarb Crumb Bars With Oats
Making these homemade strawberry rhubarb crumb bars with oats is honestly my favorite weekend ritual. First things first, get your oven preheated to 350 degrees F and line your 9×13 inch pan with parchment paper. Trust me, the parchment is non-negotiable if you want to lift the bars out cleanly later without any heartbreak!
In a large bowl, whisk together your flour, granulated sugar, brown sugar, baking powder, cinnamon, and salt. Now comes the fun part: take your cold, cubed butter and cut it into that flour mixture. I like using a pastry cutter, but your clean fingers work just as well—you want the texture to look like coarse, pea-sized crumbles. In a separate small bowl, whisk your egg, milk, and vanilla, then stir this into the flour mixture until it just barely comes together into moist crumbs.
Take about 4 cups of that mixture and press it firmly into the bottom of your pan to form your base. Save the remaining 2 cups for the topping! Next, toss your strawberries, rhubarb, sugar, cornstarch, and that bright orange zest in a bowl. Spread this juicy fruit mixture evenly over your crust, then sprinkle the remaining crumbs and oats over the top. Press down just a little bit so it sticks.
Bake for 42 to 50 minutes until the top is lightly browned and the fruit is bubbling. The hardest part? Waiting! Let them cool completely in the pan—I usually give them a few hours—before lifting them out and cutting into squares. If you have the patience, chilling them for an hour after they cool makes them slice like a dream.
Ingredient Notes and Possible Substitutions
If you find yourself short on strawberries, don’t worry! You can easily swap them for raspberries or blackberries. Just make sure to keep the total fruit volume the same so the filling stays perfectly balanced. If you prefer a deeper, more intense caramel flavor, feel free to use dark brown sugar instead of light. I have done this plenty of times when I realized my pantry was low on the lighter stuff, and it works like a charm. Just keep in mind that the darker sugar adds a bit more moisture, so the crust might be slightly softer. If you enjoy these, you might also love my raspberry streusel bars.
Tips for Perfect Homemade Strawberry Rhubarb Crumb Bars With Oats
If you want the absolute best results with these homemade strawberry rhubarb crumb bars with oats, the secret really lies in the temperature of your butter. I cannot stress this enough—keep that butter cold and cubed until the very last second! Using cold butter is what gives the crust that wonderful, flaky, crumbly texture that makes these bars so addictive. If the butter gets too warm, you will end up with a greasy, heavy base instead of a light, delicious one.
Also, don’t be tempted to slice into them too early! Once they have cooled completely, I love to pop the whole pan into the refrigerator for at least one hour. This step is a total game-changer because it helps the fruit filling set perfectly and makes the bars so much easier to cut into neat, clean squares. It takes a little extra patience, but trust me, your effort will be rewarded with a professional-looking dessert that holds its shape beautifully every single time.
Storage and Serving Suggestions
If you manage to have leftovers, they keep surprisingly well! You can store them in an airtight container right on your counter for up to 2 days. If you want them to last a bit longer, pop them into the refrigerator where they will stay fresh for about a week. My absolute favorite way to serve these is slightly warmed with a big scoop of vanilla ice cream on top. The contrast is just heaven!
Estimated Nutritional Information for Homemade Strawberry Rhubarb Crumb Bars With Oats
Keep in mind that these values are just estimates per square for my homemade strawberry rhubarb crumb bars with oats. Each serving contains approximately 210 calories, 9g of fat, 32g of carbohydrates, and 3g of protein. Your actual numbers might vary slightly depending on how you slice them! For more delicious treats, check out my full collection of dessert recipes.
Frequently Asked Questions
Can I freeze these bars? Yes! They freeze beautifully. Just wrap them tightly in plastic wrap and foil. They will stay fresh for up to three months. Why is my filling runny? You likely didn’t bake them long enough. Ensure the fruit is bubbling and the crust is golden brown.
Frequently Asked Questions
Can you freeze these? Absolutely! Just wrap your cooled squares tightly in plastic wrap and foil. They stay fresh for up to three months. If your filling seems a bit runny after cooling, it usually means they needed a few more minutes in the oven to let that cornstarch do its work. You will know they are perfectly done when the fruit mixture is bubbling vigorously and the crust has turned a lovely, deep golden brown. For more baking inspiration, browse my cookie and bar recipes.
Print
Homemade strawberry rhubarb crumb bars with oats: 1 top treat
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Total Time: 3 hours
- Yield: 18-24 squares 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Description
These homemade strawberry rhubarb crumb bars feature a buttery oat crust and a sweet tart fruit filling.
Ingredients
- 3 cups all-purpose flour
- 1/2 cup granulated sugar
- 1/2 cup packed light or dark brown sugar
- 1 teaspoon baking powder
- 1/2 teaspoon ground cinnamon
- 1/4 teaspoon salt
- 1 cup unsalted butter, cold and cubed
- 1 large egg
- 2 teaspoons pure vanilla extract
- 1/4 cup milk
- 1/3 cup old-fashioned whole rolled oats
- 2 and 1/2 cups chopped strawberries
- 2 and 1/2 cups sliced rhubarb
- 1/2 cup granulated sugar
- 1 Tablespoon cornstarch
- 1 teaspoon orange zest
Instructions
- Preheat your oven to 350 degrees F and line a 9×13 inch pan with parchment paper.
- Whisk flour, sugar, baking powder, cinnamon, and salt in a bowl, then cut in cold butter until the mixture resembles pea-sized crumbles.
- Whisk egg, milk, and vanilla, then stir into the flour mixture until it forms moist crumbs.
- Press 4 cups of the mixture into the prepared pan to form a crust and set 2 cups aside.
- Mix strawberries, rhubarb, sugar, cornstarch, and orange zest, then spread this filling over the crust.
- Top with the remaining crumble mixture and oats, pressing down lightly.
- Bake for 42 to 50 minutes until lightly browned.
- Cool completely in the pan before lifting out and cutting into squares.
Notes
- Use your hands to mix the dough for better consistency.
- Chill the pan in the refrigerator for one hour after cooling to set the bars.
- Store leftovers at room temperature for 2 days or in the refrigerator for 1 week.
Nutrition
- Serving Size: 1 square
- Calories: 210
- Sugar: 18g
- Sodium: 65mg
- Fat: 9g
- Saturated Fat: 5g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 32g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 25mg
