Blueberry Crisp with Frozen Blueberries

Making a blueberry crisp with frozen blueberries is one of the easiest desserts to make when you want something warm, fruity, and comforting without a lot of prep.

This recipe uses simple pantry ingredients, a buttery crisp topping, and frozen blueberries so you can enjoy blueberry desserts any time of year.

Whether you’re serving it for summer gatherings, holiday dinners, or an easy weeknight treat, this frozen blueberry recipe bakes up perfectly bubbly with a golden oat topping everyone loves.

A white baking dish filled with Blueberry Crisp with Frozen Blueberries, a wooden spoon resting inside, sits on a woven placemat. Text reads: Easy, Warm & Delicious Blueberry Crisp with Frozen Blueberries! www.mommalew.com.

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Why You’ll Love This Blueberry Crisp

  • Uses frozen blueberries
  • Easy pantry ingredients
  • No need to thaw berries
  • Perfect make-ahead dessert recipe
  • Great for holidays or summer gatherings
A rectangular white baking dish filled with blueberry crisp topped with golden oat crumble, surrounded by fresh blueberries and a wooden spoon on a light textured surface.

How to Make a Blueberry Crisp

  • Cook frozen blueberries with cornstarch, brown sugar, and lemon juice until thickened and juicy. Use frozen berries straight from the freezer.
  • Spread the blueberry filling into a baking dish, top with a buttery cinnamon granola topping, and bake until golden and bubbling around the edges.
  • Serve warm with vanilla ice cream for an easy blueberry dessert everyone will love.

Don’t Forget To…

  • Scroll down to print the full recipe with step-by-step instructions and exact measurements.
  • Check out my Kitchen Essentials for the pans, mixing bowls, and baking tools I use to make this recipe a breeze.
  • Save or share this recipe on Pinterest!
Can I Use Frozen Blueberries Instead of Fresh Ones for Baking?

Yes! Frozen blueberries work beautifully in baked desserts like blueberry crisp. They hold their flavor well and make it easy to enjoy blueberry desserts year-round without needing fresh berries in season.

Should You Defrost Frozen Blueberries Before Baking?

No, you do not need to thaw frozen blueberries before making blueberry crisp. Adding them frozen helps prevent the berries from becoming too soft and keeps the filling from turning watery.

Should You Toss Blueberries in Flour Before Baking?

For blueberry crisp, it’s better to toss the berries with cornstarch instead of flour. Cornstarch thickens the juices as the blueberries bake and helps create that perfectly jammy filling.

What Spice Brings Out the Flavor of Blueberries?

Cinnamon is one of the best spices to pair with blueberries because it adds warmth without overpowering the fruit. A small amount of nutmeg or lemon zest also helps enhance the natural blueberry flavor.

What’s the Difference Between Blueberry Crumble and Blueberry Crisp?

Usually the topping. A crisp traditionally contains oats, which create a crunchy texture as it bakes, while a crumble topping is typically made without oats and has a softer, streusel-like texture.

What Is the Best Type of Pan for Blueberry Crisp?

A ceramic or glass baking dish works best because it bakes evenly and keeps the filling hot longer. An 8×8 or 9×9 baking dish is ideal for most blueberry crisp recipes.

A close-up of a berry crumble in a white baking dish, with a wooden spoon scooping out a portion, showing the golden oat topping and dark purple berry filling underneath.
BLUEBERRY CRISP

More Blueberry Desserts to Try

If you love easy blueberry desserts, be sure to check out our other favorite recipes like Blueberry Cheesecake Crumb CakeYogurt Cheesecake with Blueberries, and Lemon Blueberry Cheesecake Bars.

A rectangular white baking dish filled with blueberry crisp, topped with a golden oat crumble, sits on a light textured surface. Some juices have bubbled up around the edges.

A white baking dish filled with blueberry crumble, partially served, with a wooden spoon resting on top. Some of the crumble and blueberries are visible, evoking the rustic charm of homemade berry pies.

Blueberry Crisp Recipe

This blueberry crisp with frozen blueberries is an easy dessert recipe made with juicy blueberries and a buttery cinnamon oat topping baked until golden and bubbly. Perfect served warm with a scoop of vanilla ice cream!
Print Pin Rate
Course: desserts
Cuisine: American
Keyword: Blueberry crisp, Blueberry Crisp with Frozen Blueberries, Recipe for blueberry crisp
Prep Time: 5 minutes
Cook Time: 25 minutes
Total Time: 30 minutes
Servings: 6
Author: momma lew

Ingredients

Topping:

  • 2 tablespoons butter unsalted
  • 1 cup cinnamon granola
  • ¼ cup brown sugar

Filling:

  • 1 ½ cups of blueberries
  • ½ teaspoon cornstarch
  • 2 tablespoon brown sugar
  • 1 tablespoon fresh lemon juice

Instructions

  • Preheat a 350 degree oven.
  • In a saucepan, add the butter and brown sugar. Melt over medium heat and mix together. 
  • Once those ingredients are combined, add the cinnamon granola into a pan.
  • Cook and coat the granola in the brown sugar mixture until evenly spread. Set aside.
  • In another saucepan or pot, add the blueberries, cornstarch to help thicken the fruit filling, brown sugar and lemon juice all at once. Stir together.
  • Place over medium heat and allow to melt and cook together for 5 minutes on medium heat.
  • Stir every minute or so to prevent sticking.
  • The blueberries should be softened and the sauce thickened.
  • Transfer to a casserole dish.
  • Sprinkle the topping evenly over top of the berries, making sure to cover them entirely. 
  • Bake in the oven for 15-20 minutes. Bake in the oven until the blueberry juices bubble and the topping turns into golden brown crumbles. 
  • Remove and let cool for 5-7 minutes.
  • Enjoy warm with a scoop of ice cream. 

Notes

Once the blueberry crisp has cooled completely, cover it and refrigerate leftovers. It will stay fresh for about 4 days and can be reheated in the microwave or oven before serving.
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