There’s something about simple, homemade desserts that always brings people together,
and these strawberry oatmeal bars are one of those recipes
you’ll find yourself making again and again.
They come together so easily with just one mixture for both the crust and crumble, which makes them perfect for busy days when you still want something homemade.
The buttery oat base paired with sweet, juicy strawberries creates a soft, comforting treat that’s just as good for a quick snack as it is for sharing with family.
For Strawberry Oatmeal Bars
- Butter – melted to bind everything together and create that rich, buttery base and crumble.
- All-Purpose Flour – gives structure to both the crust and the topping.
- Old-Fashioned Oats – adds a chewy texture and classic oat crumble feel.
- Granulated Sugar – sweetens the bars without overpowering the fruit.
- Light Brown Sugar – brings a hint of warmth and depth with a slight caramel flavor.
- Salt – balances the sweetness and enhances all the flavors.
For Strawberry Filling
- Fresh Strawberries – the star of the recipe, providing natural sweetness and juiciness.
- Granulated Sugar – helps draw out the juices and sweetens the filling.
- Lemon Juice – brightens the flavor and balances the sweetness.
- Cornstarch – thickens the strawberry mixture as it bakes so it sets nicely.
Simple Homemade Strawberry Oat Crumble Bars Recipe
These soft, buttery bars combine a lightly sweet oat crust with a juicy strawberry filling and a crumbly topping. The base and topping are made from the same mixture, which keeps things simple and cuts down on prep time.
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Servings: 9 bars
Notes
Ingredients
Crust and Crumble Topping
- ½ cup unsalted butter, melted
- 1 cup all-purpose flour
- ¾ cup old-fashioned oats
- ½ cup granulated sugar
- ¼ cup light brown sugar, packed
- ½ teaspoon salt, or to taste
Strawberry Layer
- 2 cups coarsely chopped fresh strawberries
- ⅓ cup granulated sugar
- 2 tablespoons lemon juice
- 2 teaspoons cornstarch
Instructions
Crust and Crumble Topping
- Preheat oven to 350F. Line an 8-inch square pan with aluminum foil and spray with cooking spray; set aside. Lining the pan helps with cleanup and is recommended.
- In a large, microwave-safe bowl melt the butter, about 1 minute on high power.
- Add the flour, oats, sugars, optional salt, and stir to combine. Mixture will be dry and sandy with some larger, well-formed crumble pieces.
- Set 1 heaping cup mixture aside to be sprinkled on later as crumble topping.
- Transfer remaining mixture to prepared pan, and using a spatula or your fingers, hard-pack the mixture to create an even, smooth, flat crust; set aside.
Strawberry Layer
- In a large mixing bowl (same one used for crust and crumble is okay), add all ingredients and toss to combine. If sugar hasn’t dissolved fully that’s okay because it liquifies while baking.
- Evenly distribute strawberry mixture over the crust.
- Evenly sprinkle with the reserved heaping 1 cup crumble topping mixture. Before sprinkling, I squeeze the mixture in my palm to encourage bigger crumble pieces to form.
- Bake for about 50 minutes, or until edges are set and center has just set. Crumble topping should appear set and very pale golden and the strawberry filling mixture will be bubbling along the edges. Bars may take longer than 50 to 55 minutes if the strawberries are very juicy. Watch your bars, not the clock, when evaluating doneness.
- Place pan on a wire rack and allow bars to cool for at least 1 hour before slicing and serving. If you try to slice bars before they’ve cooled completely, they’ll be extremely messy and could fall apart.
- Oats: Don’t use quick cook or instant, because they’re finer and behave like flour and will make the mixture too dry.
- Storage: Bars will keep airtight at room temperature for up to 1 week, in the fridge for up to 10 days, or in the freezer for up to 6 months.
- Why are my bars falling apart when I cut them?
This usually happens if they haven’t cooled long enough. Let the bars cool completely before slicing so the filling can set and hold everything together. - Can I use frozen strawberries instead of fresh?
Yes, but make sure to thaw and drain them first. Extra moisture can make the bars too soft or soggy. - How do I know when the bars are done baking?
The crumble topping should be lightly golden and the strawberry filling will be bubbling around the edges. The center should look set, not overly jiggly. - Why is my crumble too dry or too soft?
This usually comes down to the butter and mixing. The mixture should be crumbly and sandy—avoid overmixing or overheating the butter. - Can I swap the strawberries for another fruit?
Absolutely! Blueberries, raspberries, or peaches all work well. Just add a little extra cornstarch if the fruit is very juicy.
