
This sweet and buttery blueberry crisp is everything I want in a summer dessert juicy berries bubbling under a golden oat crumble. It is so simple to throw together for last minute guests or when those local blueberries are at their best. Whether served warm from the oven or chilled with a scoop of vanilla ice cream nothing says summer quite like this dish
This was a hit at our family barbecue last July and now my friends request it at every gathering. I love that I can toss it together on a whim with whatever berries or oats I have on hand
Ingredients
- Blueberries: about four cups fresh or frozen for that sweet tart filling use plump ripe berries for the best flavor
- Sweetener of choice: one and a half tablespoons boosts the berries natural sweetness try maple syrup or honey as your sweetener
- Cornstarch: one tablespoon optional helps thicken the filling especially if your berries are very juicy I sometimes skip this and it still works beautifully
- Flour: one third cup any type such as white spelt or oat flour binds the topping and adds a tender crumb choose a fine fresh flour for best results
- Rolled or quick oats: half a cup gives the crumble its hearty texture look for thick cut rolled oats for maximum crunch
- Sugar: a quarter cup brings sweetness to the topping use unrefined sugar for a deeper flavor if you like
- Cinnamon: half a teaspoon for subtle warmth make sure your cinnamon is fresh and aromatic
- Butter or coconut oil: six tablespoons makes the topping crisp and golden high quality butter or virgin coconut oil both work perfectly
Step-by-Step Instructions
- Prepare the Pan:
- Preheat your oven to three hundred seventy five degrees Fahrenheit Grease an eight by eight inch baking pan thoroughly to keep the crisp from sticking You can also double the recipe for a larger pan if making for a crowd
- Make the Fruit Filling:
- If using frozen blueberries thaw them first to avoid excess liquid In a mixing bowl toss together the blueberries sweetener of your choice and cornstarch if using Mix well so the berries are evenly coated Spread this mixture evenly into your prepared pan smoothing the berries so they fill all corners
- Mix the Crumble Topping:
- In a separate bowl combine the flour oats sugar and cinnamon Stir these dry ingredients until well mixed Add the cold butter cut into small chunks Use a pastry cutter or a fork to work the butter in gently until the mixture forms pea sized crumbles If using coconut oil stir until the crumble just comes together and looks sandy
- Assemble the Crisp:
- Sprinkle the crumble topping evenly over your prepared berries Make sure to cover the fruit as much as possible for those golden crispy bits in every bite
- Bake the Crisp:
- Place the pan on the center rack of your oven Bake for twenty five to thirty minutes Watch as the filling becomes bubbly and the topping turns golden brown For a crispier texture leave it in for a few extra minutes
- Cool and Serve:
- Remove from the oven and let the crisp cool in the pan for at least fifteen minutes This allows the filling to thicken as it cools and makes for easier scooping Serve it warm for a comforting treat or let it chill in the fridge for a firmer slice

My favorite thing about this recipe is the cinnamon oat crumble on top which always reminds me of my grandma’s Sunday brunches. My kids love helping sprinkle the topping so it has become a treasured part of our family weekends
Storage Tips
Cover leftover blueberry crisp tightly and store it in the refrigerator for up to four days. If you want to keep it longer divide it into serving sized portions and freeze Each portion can be reheated in the oven from frozen or thawed overnight in the fridge. This is my favorite way to have a sweet treat ready when guests pop by unexpectedly
Ingredient Substitutions
Swap coconut oil for butter to make this recipe dairy free Use gluten free oat flour and oats for a version that everyone can enjoy Want it less sweet Simply reduce the sugar a bit or experiment with honey or maple syrup for a different twist

Serving Suggestions
Serve warm with vanilla ice cream or a dollop of whipped cream for a classic finish. For a lighter touch try Greek yogurt on top or scatter extra fresh blueberries over each serving. It is also delicious cold right from the fridge making it ideal for summer mornings
Cultural and Historical Context
Fruit crisps have roots in traditional comfort cooking especially in the United States and the United Kingdom where resourceful cooks made the most of seasonal fruit. Blueberry crisp has become a beloved summer favorite in my house especially since blueberries peak in July in our region
Frequently Asked Questions
- → Can frozen blueberries be used?
Yes, thaw frozen berries first and drain excess liquid before assembling for the best results.
- → Is cornstarch necessary?
Cornstarch thickens the filling but can be omitted. The crisp will still set as it cools.
- → How do I make a crumbly topping?
Use cold butter and work it into dry ingredients using a fork or pastry cutter until coarse crumbs form.
- → Can I use a different flour or oats?
Absolutely. White, spelt, oat, or even nut flours work well, as do rolled or quick oats.
- → How should leftovers be stored?
Cover and refrigerate. The crisp will keep well and can also be frozen for later enjoyment.