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Berry Crisp is so much better when it has an Oatmeal Cookie Crumble on top! This easy mixed berry filling has a combination of strawberries and blueberries and has a delicious crumble on top. It’s so easy to make and so delicious!

A serving of berry crumble topped with a scoop of vanilla ice cream on a white plate, with fresh strawberries and a bowl of blueberries in the background.

The best thing about this Mixed berry crisp recipe is the giant oatmeal cookie crumble topping. Since I used fresh juicy berries and then topped it with a crumble topping, this triple berry crisp recipe has the perfect balance between tart and sweet. Fruit Crisps like this are so easy to make – you don’t have to worry about pie crust or the center being set. The sweet fruit mixes perfectly with the crunchy oat streusel topping – perfect with a giant scoop of vanilla ice cream!

Various labeled ingredients in bowls on a white surface, including blueberries, strawberries, flour, oats, salt, cinnamon, butter, sugar, brown sugar, lemon juice, and cornstarch.

How to Make Berry Crisp

  1. Cook the crumble until the fruit is bubbly and the buttery oat topping is golden brown.
  2. I used strawberries and blueberries hulled and sliced. If you want to use frozen berries, thaw and drain them a bit before adding them.
  3. Feel free to use any combination of fruit, even a triple berry blend. You can also use fresh blueberries combined with frozen fruit – any combination as long as you use about 5-6 cups of fruit.
  4. The crumb topping is made with old-fashioned oats, brown sugar, cinnamon, and cold butter. You can substitute quick-cooking oats.
  5. Work the butter into the flour mixture with a pastry cutter or fork until it’s crumbly. You might have to get your hands in it.
  6. Add sugar, cornstarch, and lemon juice to the berry mixture to sweeten and thicken it.

Click to see the recipe card below for full ingredients & instructions. See below the recipe card for even more information: process shots, variations, FAQ and more.

Variations

  • Want to make an apple crisp? Swap out the frozen berries for apple slices. Just be sure to aim for about 5 cups of fruit. 
  • You can also use this recipe to make a peach crisp.
  • Use your favorite berries – you can even use all of one kind (blackberries, strawberries, and/or blueberry crisp).
A baked mixed berry crisp in a white rectangular dish with a golden crumbly topping. A serving has been scooped out, showing the juicy berry filling and a gold spoon rests inside the dish. Nearby are a towel and a few loose berries.

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Expert tips

  • Use a pastry cutter to make cutting in the butter super easy
  • Serve warm with whipped cream or vanilla ice cream.
  • If you’re using frozen fruit, be sure to thaw it or at least make sure it’s not got chunks of ice crystals on it.
  • Use any combination of fruit: berries or peaches work fabulously.
  • You can make this with your favorite pie filling instead of the fruit.

Storage & Make Ahead

Refrigerate cooled crisp in an airtight container or covered with plastic. You can make it up to 24 hours ahead of time. It also freezes well too, sealed tightly.

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A serving of berry crumble topped with a scoop of vanilla ice cream on a white plate, with fresh strawberries and a bowl of blueberries in the background.

Mixed Berry Crisp Recipe

4.50 from 40 votes
The topping on this Berry Crisp tastes just like an oatmeal cookie! Use your favorite berries to make a fabulous summer dessert.

Recipe Video

Prep Time 20 minutes
Cook Time 30 minutes
Total Time 50 minutes
Yield 8 servings
Serving Size 1 serving
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Ingredients
 

  • ¾ cup (93g) all purpose flour
  • ¾ cup (64g) quick cook oats
  • ¾ cup (150g) packed brown sugar
  • 1 teaspoon cinnamon
  • 6 tablespoons (78g) cold unsalted butter diced
  • ¼ teaspoon salt
  • 1 pound strawberries hulled and sliced (may substitute frozen)
  • 2 cups blueberries frozen or fresh
  • ½ cup (50g) granulated sugar
  • 1 tablespoon lemon juice
  • 3 tablespoons (24g) cornstarch

Instructions

  • Preheat oven to 350°F.
  • Make the crumble by combining the flour, brown sugar, oats, cinnamon and salt in a large bowl. Use a pastry cutter to cut in the butter until the mixture forms small crumbs. You may need to use your hands to help it along. Set aside.
  • Place strawberries and blueberries in a large bowl. Toss gently with sugar, lemon, and cornstarch Place in the bottom of a 8” square pan.
  • Pour the crumble over the top and press down slightly to compact.
  • Bake for 30-33 minutes. It’s done when the crust is browned and the topping looks crunchy. Serve warm (or room temperature) with whipped or ice cream. Note: if you serve it before it cools and has time to gel, the filling will spill in the pan.
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Recipe Notes

  • Aim for about 5-6 cups of fruit.
  • If you’re using frozen fruit, be sure to thaw it or at least make sure it’s not got chunks of ice crystals on it.
  • Use any combination of fruit: berries or peaches work fabulous.

Recipe Nutrition

Serving: 1serving | Calories: 225kcal | Carbohydrates: 54g | Protein: 2g | Fat: 1g | Saturated Fat: 1g | Sodium: 91mg | Potassium: 154mg | Fiber: 2g | Sugar: 37g | Vitamin A: 110IU | Vitamin C: 35.9mg | Calcium: 48mg | Iron: 2.3mg
Nutritional information not guaranteed to be accurate
Course Dessert
Cuisine American
Author Dorothy Kern

Did you try this recipe? Click the stars to rate the recipe below

A glass bowl filled with a mixture of dry baking ingredients, including flour, oats, and brown sugar, sitting on a white marble surface.
A glass bowl filled with a crumbly brown mixture sits on a white marble surface, with part of a metal pastry cutter visible in the top right corner.
A glass bowl filled with chopped strawberries and blueberries coated in powdered sugar, placed on a white marble surface.
A white rectangular dish filled with chopped strawberries and blueberries mixed together, with some berry juice visible on the fruits and dish, set on a white surface.

Step-by-Step Photos

  1. Preheat oven to 350°F 
  2. Combine the flour, brown sugar, oats, cinnamon, and salt in a large bowl. 
  3. Cut the cold butter until the mixture forms small crumbs. You can use your hands or a pastry cutter to do this. Set the crumble mixture aside. 
  4. Toss strawberries and blueberries in a large bowl with sugar, lemon, and cornstarch
  5. Pour the berry mixture into the bottom of a baking dish. Then pour the crumble mixture evenly over the top and press down slightly to compact.
  6. Bake for 30-33 minutes. Your berry crisp is done when the crust is golden brown and the topping looks crunchy. Enjoy! 

Other Berry Recipes

Dorothy Kern

Welcome to Crazy for Crust, where I share recipes that are sometimes crazy, often with a crust, and always served with a slice of life.

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4.50 from 40 votes (20 ratings without comment)

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38 Comments

  1. Can this be made the day before and should it be refrigerated or kept at room temperature?  Also can it be reheated and at what temperature? Thanks☺

    Reply

    1. You can make it ahead, I’m sure. I’d let it come to room temperature on the kitchen counter and then either microwave slices as you eat it or put the room temp pan in a 200°F oven while you’re having dinner to warm it up.

      Reply

  2. Would this work with apples by just substituting the same volume of fruit?  Would the cook time change since apples are not as soft as berries?

    Reply

    1. Yes, you could totally substitute apples! That would be awesome. I’m not sure about the cooking time (how the crumble would fare cooking it longer) but if you like softer apples you can par-boil them before assembling the crumble. It’s what I do for all my pies because I can’t stand chewy apples! Just boil them in enough water so that it won’t boil out but it doesn’t cover the completely, for just a few minutes until they start to get soft. 🙂

      Reply

  3. This was SO delicious and easy to make! I made it with 4 cups blackberries and 1.5 cups strawberries. I loved that it could be made in advance and then baked while we had dinner with guests. Thank you for this wonderful recipe… it’ll be my go-to now for summer berry crisps. I’m just sad that I waited til the end of summer to try it 🙂

    Reply

  4. I have made this 3 times now….and added 1 1/2 cups of fresh pitted cherries in addition to the strawberries and blueberries. It is amazing!!!

    Reply