This mixed berry crumble pie is a sweet and tart crowd-pleaser, filled with juicy fresh or frozen triple berries and finished with a buttery, crunchy streusel topping. I love making it year-round.

A slice of juicy mixed berry crumble pie on plate topped with a dollop of whipped cream.

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Triple Berry Crumble Pie

This mixed berry crumble pie recipe is similar to my razzleberry pie but I use a crumble topping rather than a lattice pie crust. Just like my peach crumble pie it adds the perfect sweet topping with an extra bit of melt in your mouth crunch.

This crumble pie comes together so easily in just over an hour! If you have the time, I recommend using my super simple homemade pie crust recipe. It’s light, flaky, buttery, and perfect for beginners. Otherwise, a store-bought frozen crust will work in a pinch.

Recipe Ingredients

A few pantry staples plus berries and a pie crust, et voila! You have a delightful dessert with a dreamy berry pie filling and an addictive crumble with hardly any effort.

Streusel crumble topping in a bowl being mixed together with a fork.

Find the full printable recipe with measurements below.

  • Crumble topping: The 5 ingredient streusel topping uses pantry staples and adds an extra bit of brown sugary goodness. It’s made with rolled oats, light brown sugar, flour, cinnamon and salted butter.
  • Mixed berries: The sweet, juicy, and plump mixed berry filling is a perfect way to show off seasonal fruits. Otherwise, frozen mixed berries work just as well year-round.
  • Sugar: Fine granulated sugar is mixed in with the filling to add sweetness and balance out any tartness from the fresh berries.
  • Cornstarch: Added to thicken the berry filling. If you don’t have any cornstarch on hand, all-purpose flour works just as well.
  • Salt: Just a pinch to help balance out the sweetness of the filling.
  • Pie crust: Use an unbaked store-bought pie crust (I prefer the pie dough found in the freezer section) or make your own from scratch with this easy pie crust recipe or butter pie crust recipe.

How to Make Mixed Berry Crumble Pie

This mixed berry pie with a crumble topping is simple to make and will become one of your absolute favorites. Follow these steps below to get started.

Step by step photo collage making mixed berry crumble pie.
  1. Make the crumble. Stir the oats, sugar, flour, cinnamon and butter in a bowl until combined. It helps to use your hands when mixing together, so that the crumble gets nice and clumpy.
  2. Mix the berry filling. Next comes the sweet berry filling. Place your fresh berries in a bowl. Then in a separate bowl, mix together the sugar, cornstarch and salt. Pour the sugar mixture over the berries and toss the fruit until well coated.
  3. Roll out the crust. Use a rolling pin to roll out the pie dough on a floured surface until it’s about 1/8 – 1/4″ thick. Then carefully place the dough in a pie pan.
  4. Assemble and bake. Use a slotted spoon to scoop the berry mixture on top of the crust, leaving the excess fruit juices in the bowl. Then evenly sprinkle the crumble topping over the berries. Bake in the oven at 375°F for about 40 to 50 minutes, or until the crumble topping is golden and the center filling is firm.

Let Cool

Make sure you allow time for cooling! The mixed berry crumble pie needs to cool at room temperature for at least 3 to 4 hours before serving. The filling needs time to set and thicken up, or else it will be too runny.

A mixed berry pie with crumb topping resting on counter.

Tips for the Best Mixed Berry Crumble Pie

  • Fruit ratio. I like to use about twice as many raspberries as blackberries and blueberries, but you can figure out the ratio you prefer. In fact, you could make a crumble pie entirely with one type of berry if you’d like!
  • If using frozen mixed berries, take out the strawberries and save them to use in another recipe. Thaw the rest of the berries slightly and drain any excess juices.
  • Place on a baking sheet. Before going in the oven, place your pie plate on a baking sheet. This will help catch any juices that overflow from the berry filling so that it doesn’t make a mess in your oven.
  • Add foil to the edges if you notice the crust is browning too fast.
  • Enjoy a slice with whipped cream or a scoop of vanilla ice cream and for fancier occasions, present it to your guests with piping of stabilized whipped cream.
Close up of triple berry pie recipe on a plate with a dollop of whipped cream.

Want more fruit pies? Try apple crisp blueberry crisp recipe, my crumble pear pie or Dutch apple pie, too.

More Berry Dessert Recipes

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sliced berry pie on white plate

Mixed Berry Crumble Pie

5 from 8 votes
Recipe by: Jamielyn Nye
Prep Time: 30 minutes
Cook Time: 50 minutes
Cool: 3 hours
Total Time: 4 hours 20 minutes
Servings: 8
It's part crisp, part crumple, and all pie! This amazing berry crumble pie is a sweet, tart, and crispy crowd-pleaser filled with juicy berries and a buttery crispy streusel topping!  
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Ingredients 

Crumble Topping

  • ¼ cup rolled oats
  • ¼ cup light brown sugar , packed
  • ¼ cup all-purpose flour
  • ¼ teaspoon ground cinnamon
  • 4 Tablespoons salted butter , softened

Berry Pie

  • 5 cups mixed berries , *see note
  • 1 cup granulated sugar
  • ⅓ cup cornstarch , or all-purpose flour
  • ½ teaspoon Kosher salt
  • 1 store-bought or homemade pie crust , unbaked

Serve with: Vanilla ice cream or Whipped cream

Instructions

Crumble Topping

  • In a medium bowl, mix the oats, sugar, flour, cinnamon, and butter until well combined and clumpy. You may want to use your hands to rub the mixture together.

Berry Pie

  • Preheat the oven to 375°F. Place baking sheet in the oven.
  • In a medium bowl, toss together mixed berries. In a separate small bowl, mix together the sugar, cornstarch, and salt. Pour sugar mixture over berries and toss to combine.
  • Roll out pie crust and place in a pie tin. Using a slotted spoon, scoop the berry mixture into the crust, leaving any excess juices in the bowl. Sprinkle the crumble topping evenly over the berries.
  • Place pie on top of baking sheet in oven. Bake 40 to 50 minutes, or until top is golden brown and the center is firm. Cover the crust with foil if it is browning too fast. Remove from oven.
  • Let cool 3 to 4 hours to thicken before slicing. Serve with fresh whipped cream or vanilla ice cream.

Last step: Please leave a comment and rating after you make the recipe.

Notes

Berries: You can use fresh or frozen berries for this pie. I prefer to use more raspberries (about 2 cups raspberries, 1 cup blackberries, and 1 cup blueberries). For frozen mixed berries, take out the strawberries and allow to thaw slightly. Drain any excess juices.
Pie crust: You can buy a pre-made pie crust (I prefer the one in the freezer section) or make half a batch of my favorite pie dough.
Storage: Once the berry pie is completely cooled, store it in an airtight container for up to 5 days in the fridge. This crumble tastes just as good at room temperature as it does warm, so the choice is yours.

Nutrition

Calories: 363kcal, Carbohydrates: 63g, Protein: 3g, Fat: 12g, Saturated Fat: 5g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 4g, Trans Fat: 0.2g, Cholesterol: 15mg, Sodium: 281mg, Potassium: 98mg, Fiber: 4g, Sugar: 40g, Vitamin A: 220IU, Vitamin C: 2mg, Calcium: 22mg, Iron: 1mg

Nutrition provided is an estimate. It will vary based on specific ingredients used.

FAQs

How do I make my mixed berry crumble pie not runny?

Adding cornstarch to the berry filling helps thicken the juices without changing the flavor. Be sure not to skip it, or the filling may turn out runny. If you do not have cornstarch, you can substitute all-purpose flour instead.

It is also important to let the pie cool for 3 to 4 hours before slicing. The filling will look loose when it first comes out of the oven, but it thickens as it cools and fully sets.

Can you use frozen berries in this mixed berry pie?

Sure! Let them thaw slightly before using and make sure to drain any excess juices before preparing the filling. As mentioned above, we don’t want a runny triple berry pie!

Can this mixed berry crumble recipe be made gluten-free?

Make this mixed berry crumble pie gluten-free by substituting gluten-free 1:1 all-purpose flour in not only the streusel topping but also the crust. You also want to make sure your oats are certified gluten-free.

How do I store and reheat mixed berry crumble pie?

Once the pie has completely cooled, store it in an airtight container in the refrigerator for up to 5 days. This triple berry crumble pie tastes just as good at room temperature as it does warm.

To reheat, warm the pie in a 350°F oven for 15–20 minutes, depending on how much is left. For a single slice, you can also microwave it for about 30 seconds.