These blueberry jam bars are soft, sweet, and bursting with fruity flavor. They have a hearty cookie-like base, a thick layer of juicy blueberry jam in the middle, and a dusting of oat crumble on top. They’re an easy-to-make dessert or snack, and they’re ready in just an hour!
These blueberry jam bars are our favorite summer dessert by far! A thick layer of juicy blueberry jam is sandwiched between a hearty cookie-like crust and streusel topping, then baked until golden. They’re easy to make vegan or gluten-free, and they come together in just a few easy steps (no baking experience required)!
Key ingredients
- Butter + coconut oil : a combination of butter and coconut oil helps the crumble stick together while keeping it crispy, light, and flavorful.
- Rolled oats : regular rolled oats give the crumble a hearty texture. You can also use quick oats.
- All-purpose flour : a bit of all-purpose flour gives the crumble topping a cookie-like quality.
- Sugar : we use a granulated sugar but you can substitute for light brown sugar or coconut sugar if desired.
- Blueberries : we love using fresh blueberries in the summer when they’re in season, otherwise frozen blueberries work great.
How long do these bars keep at room temperature?
These blueberry jam bars will keep at room temperature in an airtight container for about 2 days, or in the fridge for up to 5 days. They taste great cold, but can also be reheated in the oven at 350 degrees Fahrenheit for a few minutes.
Can I use other berries?
Yep! Other berries, such as fresh raspberries and blackberries, are an excellent substitute for blueberries. Use one type of berry or try a mix!
Can I use blueberry jam instead?
No, the fresh blueberry filling is really the highlight of this dessert, and using jam won’t work because it’s too thick.
Blueberry Jam Bars Recipe
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Ingredients
The Oat Crumble
- ▢ ½ cup butter
- ▢ ¼ cup coconut oil
- ▢ ¼ cup honey
- ▢ 1 ½ cups rolled oats
- ▢ 1 cup all-purpose flour
- ▢ ½ cup sugar (can use coconut sugar)
- ▢ A pinch of sea salt
The Blueberry Jam
- ▢ 3 cups fresh blueberries
- ▢ ¼ cup sugar or honey (your choice!)
- ▢ 1 tablespoon cornstarch
- ▢ Juice and zest of 1 lemon
Instructions
- Preheat your oven to 350 degrees Fahrenheit. Line an 8×8 inch baking pan with parchment paper. In a small pot, melt the butter and coconut oil. Pour the honey into the pot. ½ cup butter, ¼ cup coconut oil, ¼ cup honey
- In a large mixing bowl, add the rolled oats, all-purpose flour, sugar, and sea salt. Pour the melted butter into the bowl (keep the pot handy) and mix well. Set aside 1 cup of the mix and pour the rest into the prepared baking pan. Press down firmly to create the crust. 1 ½ cups rolled oats, 1 cup all-purpose flour, ½ cup sugar, A pinch of sea salt
- In the same pot used for the butter, add all the blueberry jam ingredients. Bring to a boil over high heat then reduce the heat to low. Simmer for 2 minutes, or until the jam thickens. It won’t be as thick as jam from your fridge. 3 cups fresh blueberries, ¼ cup sugar or honey, 1 tablespoon cornstarch, Juice and zest of 1 lemon
- Pour the jam over the crust and sprinkle the top with the remaining oats you set aside. Bake in your oven for 40 minutes.
- Let the blueberry jam bars cool in the pan and then remove them with the parchment paper and cut them into 12-16 bars.
Nutrition
We have thoroughly tested this recipe for accuracy. However, individual results may vary. See our full recipe disclosure here .
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More bar recipes
For more inspiration, check out all of our dessert recipes !
Lemon Bars with Coconut Shortbread Crust
Mom’s Nanaimo Bars – Our Authentic Canadian Dessert
Nut Free Granola Bars (no bake!)
Coconut Fig Squares
Blueberry Jam Bars Recipe
Ingredients
The Oat Crumble
- ½ cup butter
- ¼ cup coconut oil
- ¼ cup honey
- 1 ½ cups rolled oats
- 1 cup all-purpose flour
- ½ cup sugar , can use coconut sugar
- A pinch of sea salt
The Blueberry Jam
- 3 cups fresh blueberries
- ¼ cup sugar or honey , your choice!
- 1 tablespoon cornstarch
- Juice and zest of 1 lemon
Instructions
- Preheat your oven to 350 degrees Fahrenheit. Line an 8x8 inch baking pan with parchment paper. In a small pot, melt the butter and coconut oil. Pour the honey into the pot. ½ cup butter, ¼ cup coconut oil, ¼ cup honey
- In a large mixing bowl, add the rolled oats, all-purpose flour, sugar, and sea salt. Pour the melted butter into the bowl (keep the pot handy) and mix well. Set aside 1 cup of the mix and pour the rest into the prepared baking pan. Press down firmly to create the crust. 1 ½ cups rolled oats, 1 cup all-purpose flour, ½ cup sugar, A pinch of sea salt
- In the same pot used for the butter, add all the blueberry jam ingredients. Bring to a boil over high heat then reduce the heat to low. Simmer for 2 minutes, or until the jam thickens. It won’t be as thick as jam from your fridge. 3 cups fresh blueberries, ¼ cup sugar or honey, 1 tablespoon cornstarch, Juice and zest of 1 lemon
- Pour the jam over the crust and sprinkle the top with the remaining oats you set aside. Bake in your oven for 40 minutes.
- Let the blueberry jam bars cool in the pan and then remove them with the parchment paper and cut them into 12-16 bars.
