Mixed Berry Crisp with Frozen Berries

There’s something special about the scent of a warm dessert wafting from the oven; it draws everyone in. This mixed berry crisp with frozen berries is that kind of dessert; easy to make, full of flavor, and perfect for any season.

No need to wait for fresh berries or stress about spoilage; frozen fruit works wonders. This mixed berry crisp with frozen berries brings together juicy, tart berries and a buttery oat topping for a dessert that feels both rustic and indulgent.

Whether it’s a cozy night in or a casual dinner with friends, this mixed berry crisp with frozen berries hits the sweet spot. Simple ingredients, bold flavor; and yes, it really is as good as it smells.

Why This Mixed Berry Crisp with Frozen Berries Is a Game-Changer

This mixed berry crisp with frozen berries has become my go-to dessert for a reason; it’s easy, delicious, and always in season. Unlike fresh berries that can be pricey or spoil too fast, frozen berries are budget-friendly, convenient, and perfect for baking. As they cook, they release their natural juices; giving you that glossy, juicy filling every crisp should have.

You can mix and match any frozen berries; blueberries, raspberries, blackberries, even strawberries; and they all shine in this recipe. The golden oat topping, with hints of brown sugar and cinnamon, adds a cozy crunch that pairs perfectly with the warm berries.

Whether you serve it with ice cream, whipped cream, or a splash of cream, this mixed berry crisp with frozen berries is just as welcome at a casual family meal as it is at a dinner party. And trust me; the smell while it bakes is reason enough to make it.

Jump to:

• Ingredients
• Instructions
• Ingredient Notes & Substitutions
• Recipe Variations & Dietary Swaps
• Equipment
• Storage & Make-Ahead Tips
• The Secret That Took My Mixed Berry Crisp to Bakery-Level
• FAQ
• One Crisp You'll Make Again and Again
• Related
• Pairing
• Mixed Berry Crisp with Frozen Berries

Ingredients

For the Berry Filling:

• Mixed frozen berries (blueberries, raspberries, blackberries, strawberries)
• Granulated sugar
• Cornstarch
• Lemon juice
• Vanilla extract
• Cinnamon
• Salt

For the Crumble Topping:

• Old-fashioned oats
• All-purpose flour
• Brown sugar
• Cold butter, cubed
• Cinnamon
• Salt

See recipe card for quantities.

Instructions

Prep and Mix Berry Filling

1. Preheat your oven to 375°F (190°C) and grease a 9x13-inch baking dish.
2. In a large bowl, combine frozen mixed berries, granulated sugar, cornstarch, lemon juice, vanilla extract, cinnamon, and salt.
3. Toss until berries are well-coated, then pour into your prepared baking dish.

Pro Tip: If your frozen berries seem particularly tart, add an extra 2-3 tablespoons of sugar. Don't thaw the berries first – using them frozen prevents mushiness!

Make the Crumble Topping

1. In a separate bowl, mix oats, flour, brown sugar, cinnamon, and salt.
2. Add cold, cubed butter and work it in with your fingers or a pastry cutter until the mixture looks like coarse crumbs with some larger butter pieces.

Expert Tip: Keep your butter cold! This creates steam as it melts, making the topping light and crispy rather than dense.

Top and Bake

1. Evenly sprinkle the crumble mixture over the berries – don't pack it down.
2. Bake for 40-45 minutes, until the topping is golden brown and the berry filling is bubbling around the edges.

Cool and Serve

1. Let the crisp cool for 10-15 minutes before serving. This allows the filling to thicken slightly and makes it easier to serve.
2. Serve warm with vanilla ice cream or whipped cream!

Expert Tips for the Best Mixed Berry Crisp with Frozen Berries

Want your mixed berry crisp with frozen berries to turn out just right? Keep these quick pro tips in mind;

• Lemon Juice Boost: A little goes a long way; it brightens the berries and keeps the flavor balanced; not overly sweet.
• Watch for Bubbles: It’s done when the topping is golden and the berry filling bubbles at the edges. Tent with foil if it browns too fast.
• Crumbly, Not Mushy: For that perfect topping, aim for crispy on top and tender beneath. If needed, drop your oven to 350°F and bake a little longer.
• Butter Size Counts: Use ½-inch cubes; too small and they melt into paste, not crumbs. That crumble is key to a great mixed berry crisp with frozen berries.

These small details make a big difference; your next mixed berry crisp with frozen berries will thank you.

Ingredient Notes & Substitutions

Making the perfect mixed berry crisp with frozen berries is simple, and these quick tips make it even more flexible;

• Frozen Berries: No need to thaw; adding them frozen helps keep their shape and prevents a soggy filling.
• Cornstarch Alternative: Swap with 2 tablespoons of all-purpose flour or tapioca starch.
• Brown Sugar: Light brown works great; dark brown adds a richer, molasses flavor.
• Gluten-Free: Use a 1:1 gluten-free flour blend in place of regular flour.
• Butter Substitute: Try cold vegan butter or solid coconut oil for a dairy-free crisp.

These easy swaps ensure your mixed berry crisp with frozen berries turns out delicious—no matter what’s in your pantry.

Recipe Variations & Dietary Swaps

There’s more than one way to enjoy a mixed berry crisp with frozen berries; here are a few fun twists and easy diet-friendly tweaks;

Flavor Variations

• Tropical Touch: Swap in frozen mango or pineapple for half the berries
• Apple-Berry Blend: Add sliced apples for a cozy fall spin
• Citrus Zest: Mix lemon or orange zest into the topping for a fresh boost
• Nut Crunch: Add chopped pecans or almonds to the crumble for extra texture

Diet-Friendly Adaptations

• Gluten-Free: Use gluten-free oats and flour; your mixed berry crisp with frozen berries will still have that classic texture
• Sugar-Free: Sub in monk fruit or erythritol and a brown sugar alternative
• Vegan: Use vegan butter or coconut oil and be sure your sugar is vegan-friendly
• Lower Carb: Cut the oats in half and add nuts; use a low-carb baking sweetener

These tweaks let you customize your mixed berry crisp with frozen berries to match your cravings; or your pantry.

Equipment

• 9x13-inch Baking Dish or Cast-Iron Skillet: A cast-iron skillet gives you the most even heating and creates beautiful presentation for serving directly from the pan.
• Large Mixing Bowls: You'll need at least two – one for the berry mixture and one for the crumble topping.
• Pastry Cutter or Clean Hands: For working the butter into the dry ingredients. Your hands actually work great and give you better control over the texture.
• Sharp Knife: For cubing the cold butter into uniform pieces.

Storage & Make-Ahead Tips

This mixed berry crisp with frozen berries is just as delicious the next day—maybe even better. Here’s how to store and reheat it like a pro;

Fridge:

Cover with foil or plastic wrap and refrigerate for up to 4 days. The flavors deepen over time, making it even more irresistible.

Freezer-Friendly:

• Before Baking: Assemble in a freezer-safe dish, wrap well, and freeze up to 3 months. Bake from frozen; just add 10–15 minutes to the time.
• After Baking: Cool fully, wrap tightly, and freeze for up to 3 months. Thaw overnight and reheat at 350°F for 15–20 minutes.

Reheating:

Microwave single servings for 30–60 seconds or warm the whole mixed berry crisp with frozen berries in the oven at 350°F until hot and crispy.

With these tips, your mixed berry crisp with frozen berries stays just as cozy and delicious—even days later.

FAQ

One Crisp You'll Make Again and Again

This mixed berry crisp with frozen berries is proof that simple ingredients can lead to something truly special. You don’t need any fancy techniques; just frozen berries, a buttery crumble, and a little oven magic. It’s one of those recipes that feels like a win every single time; whether you're baking for the family or showing up to a potluck with dessert in hand.

Personally, I love rotating this recipe into my week alongside refreshing treats like my Frozen Protein Yogurt Bark Recipe; yes, that’s right, the Frozen Protein Yogurt Bark Recipe is another go-to when I want something light and high-protein to balance out the indulgence.

So go ahead, give this crisp a try. I’d love to hear how yours turns out; what berries you used, any twists you added, or how fast it disappeared from the table. And don’t forget to leave a rating and share your photos; seeing your baking wins makes my day!

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Pairing

These are my favorite dishes to serve with this Mixed Berry Crisp with Frozen Berries recipe: