Blueberry crisp is a classic dessert that highlights the sweet-tart flavor of fresh blueberries, topped with a golden, crunchy layer. This no-flour version is naturally gluten-free, relying on oats and nuts for texture and flavor. It’s a simple, crowd-pleasing treat perfect for summer or anytime you crave a fruity, comforting dessert.
Ingredients
- 4 cups fresh or frozen blueberries (about 600g)
- 2 tablespoons cornstarch
- 1/2 cup granulated sugar (100g), divided
- 1 tablespoon lemon juice
- 1 teaspoon lemon zest (optional)
- 1 1/2 cups old-fashioned rolled oats (135g, gluten-free if needed)
- 1/2 cup chopped pecans or walnuts (60g)
- 1/2 cup unsweetened shredded coconut (40g, optional for texture)
- 1/2 teaspoon ground cinnamon
- 1/4 teaspoon kosher salt
- 1/2 cup unsalted butter (115g), melted
- 1 teaspoon pure vanilla extract
Instructions
- Preheat your oven to 350°F (175°C). Lightly grease an 8-inch square baking dish or a similar 2-quart baking dish.
- In a large bowl, toss the blueberries with cornstarch, 1/4 cup sugar, lemon juice, and lemon zest if using. Stir gently to coat the berries evenly.
- Spread the blueberry mixture evenly in the prepared baking dish.
- In a separate bowl, combine the rolled oats, chopped nuts, shredded coconut (if using), remaining 1/4 cup sugar, cinnamon, and salt. Mix well.
- Pour the melted butter and vanilla extract over the oat mixture. Stir until all the dry ingredients are moistened and clumps begin to form.
- Sprinkle the oat topping evenly over the blueberries, covering them completely but without packing the topping down.
- Bake for 35-40 minutes, or until the topping is golden brown and the blueberry filling is bubbling around the edges.
- Let the crisp cool for at least 15 minutes. Serve warm, at room temperature, or chilled.
Tips
- Substitutions: You can use coconut oil or vegan butter instead of dairy butter for a vegan version. Almonds or sunflower seeds can replace pecans or walnuts for a nut-free option (or omit nuts entirely).
- Oats: Be sure to use old-fashioned rolled oats, not quick oats or steel-cut, for the best texture. For strict gluten-free needs, pick certified gluten-free oats.
- Frozen Blueberries: If using frozen blueberries, do not thaw before baking. Add an extra teaspoon of cornstarch to help thicken the extra juices.
- Sweetness: Adjust the sugar to taste based on how sweet your berries are. Taste one before adding sugar if possible.
Serving Suggestions
This blueberry crisp is delicious on its own, but even better with a scoop of vanilla ice cream or a dollop of whipped cream. For a lighter option, serve with plain Greek yogurt or crème fraîche. It’s also a tasty breakfast treat with a splash of milk or almond milk the next morning.
Variations
- Mixed Berry Crisp: Substitute half the blueberries with raspberries, blackberries, or chopped strawberries for a colorful mixed berry version.
- Apple-Blueberry Crisp: Replace 2 cups of blueberries with 2 peeled and diced apples for added sweetness and texture.
- Spiced Topping: Add a pinch of nutmeg or ginger to the oat mixture for a warming spice note.
- Maple or Honey: Swap half the sugar in the topping for maple syrup or honey for a different flavor profile (reduce butter slightly if using liquid sweetener).
Storage and Reheating
Allow the crisp to cool completely, then cover tightly with foil or transfer to an airtight container. Store in the refrigerator for up to 4 days. To reheat, place a portion in a microwave-safe dish and microwave for 30-60 seconds until warm, or reheat the whole crisp in a 325°F (160°C) oven for 15-20 minutes, uncovered, to re-crisp the topping. The crisp can also be frozen for up to 2 months; thaw overnight in the fridge and reheat as above.
Frequently Asked Questions
- Can I make this blueberry crisp ahead of time?
Yes, you can assemble the crisp up to 24 hours in advance, cover, and refrigerate. Bake just before serving for the best texture. If baking from cold, add 5-10 minutes to the bake time and check for bubbling fruit and a golden topping. - Is this recipe gluten-free?
This recipe is naturally gluten-free as long as you use certified gluten-free oats. Some oats are processed in facilities that handle wheat, so check the label if you have celiac disease or a gluten intolerance. - What can I use instead of cornstarch?
If you don’t have cornstarch, arrowroot powder or tapioca starch are good alternatives for thickening the filling. Use the same amount as listed for cornstarch. - Can I reduce the sugar?
Yes, you can reduce the sugar in both the filling and the topping by 1-2 tablespoons each without significantly affecting the texture. If your berries are very sweet, you may not need the full amount. - Why is my topping not crisp?
If the topping is soggy, it may be due to too much moisture from the fruit or not baking long enough. Make sure to bake until the topping is golden and the filling is bubbling. Baking uncovered helps the topping crisp up. - Can I use steel-cut oats?
Steel-cut oats do not soften enough during baking for this recipe. Stick with old-fashioned rolled oats for the best result.
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