Apple Crumble Pie

Tart Granny Smith apples under a brown sugar-oat crumble that bakes into something between a streusel and a cookie (yum!). The easiest apple pie to make and, honestly, my favorite to eat.

What You’ll Need

Pie Filling

• 1 single pie crust. Homemade or store-bought, both work.
• 2 ½ pounds Granny Smith apples (5–6 apples). Granny Smiths hold their shape and stay tart against all that sugar. Honeycrisp, Jonagold, or Braeburn work too, alone or mixed in.
• 2 tablespoons lemon juice
• ½ cup light brown sugar, packed
• ½ cup granulated sugar.
• ⅓ cup all-purpose flour
• 2 tablespoons unsalted butter, melted.
• ½ teaspoon ground cinnamon
• ¼ teaspoon salt

Crumb topping

• ¾ cup all-purpose flour (90 grams)
• ½ cup light brown sugar, packed
• ½ cup instant oats
• ½ teaspoon ground cinnamon
• ¼ teaspoon salt
• 6 tablespoons unsalted butter, softened

Equipment You’ll Need

• 9-inch pie plate
• Pastry blender. For the crumb topping. Two forks or your fingers work too — you’re just cutting butter into flour.
• Rimmed baking sheet. Pie juices will bubble over. Put the pie on the sheet, save your oven.

Instructions

Roll out the crust and preheat the oven

Preheat your oven to 375°F and slide the rack to the lowest position. This sets the bottom crust before the filling soaks it. Roll out your pie dough, line a 9-inch pie plate, trim the excess, and crimp the edges however you like.

Don’t stretch the dough as you fit it into the plate. Stretched dough shrinks back during baking, and you end up with a short, sad crust holding way less filling than you wanted. Ease it in gently and let it settle.

Toss the apple filling

Peel, core, and slice your apples into ¼-inch pieces. You want about 8 cups. Dump them in a big bowl with the lemon juice, both sugars, flour, melted butter, cinnamon, and salt, and stir gently until every slice is coated.

Keep the slices a uniform thickness. I know it sounds fussy, but if half your apples are thin and half are thick chunks, you’ll bake until the chunks are tender and the thin ones will have turned to mush. Watch the slices, not the clock.

Granny Smiths are my pick here. They hold their shape and their tartness cuts through all that sugar. Honeycrisp, Jonagold, or Braeburn all work too, or a mix.

Mix the crumble topping

In a separate bowl, combine the flour, brown sugar, oats, cinnamon, salt, and butter. Work it with a pastry blender until there are no streaks of flour and the whole thing looks like coarse, clumpy crumbs.

If you only have salted butter, use it and skip the ¼ teaspoon of salt.

Assemble the pie

Pour the apples into the crust and arrange them so the top is reasonably flat. A mounded pile in the middle bakes unevenly. Spoon the crumble over the apples in an even layer, then press it down lightly so it sticks.

Press gently. You’re helping the topping adhere, not compacting it into a brick. You still want it crumbly when it bakes.

Bake until deep golden

Set the pie plate on a rimmed baking sheet: apple pies almost always bubble over, and you’ll thank yourself later. Bake for 50 to 60 minutes, until the topping is a deep golden brown and you can see the filling bubbling thickly through the crumbs.

Check it at 40 minutes. If the edge of the crust is getting dark, tent the whole pie loosely with foil. And use your eyes, not the timer. A pale crumble topping is no what we are after.

Cool for two hours

Move the pie to a cooling rack and leave it alone for a full two hours. I know.

The filling is still molten when it comes out of the oven, and that flour needs time to set up into the syrupy juice you actually want. Cut it too soon and you’ll have apple soup in the pie plate. It’s still warm at two hours — you’re not waiting until it’s cold, just until it’s set.

Storage Instructions

The pie keeps at room temperature, loosely covered, for the first day. That’s actually my preference for leftover slices the next morning with coffee. After that, cover and move it to the fridge, where it will keep for up to 5 days.

To reheat a slice, 10-15 minutes in a 325-degree oven brings the topping back to crisp. The microwave works in a pinch, but the crumble goes soft.

You can freeze the whole baked pie, well wrapped in plastic and then in foil, for up to 2 months. Thaw overnight in the fridge and warm in a 325-degree oven for 20-25 minutes before serving.

Questions and Troubleshooting

Can I use a different apple variety?

Granny Smith is my pick because it’s tart and holds its shape, but Honeycrisp, Jonagold, or Braeburn all work. A mix is great too. Don’t use a soft baking apple like McIntosh — it’ll turn to mush.

Can I use old-fashioned rolled oats instead of instant?

Yes. The topping will be a little chewier and less cookie-like, but it still works. Don’t use steel-cut.

Why is my filling watery?

Either the pie didn’t bake long enough or the apples were extra juicy. The flour needs heat and time to thicken. Bake until the filling is bubbling around the edges, not just until the topping looks done.

Can I make this ahead?

Yes. Bake it the day before and leave it loosely covered at room temperature overnight. Apple pie is honestly better the next day once the filling has set up.

Store-bought pie crust…okay or not?

Totally fine. I’d rather you make this pie with a store-bought crust than not make it at all.

My crumble topping melted into the filling instead of staying crumbly. What happened?

The butter was too warm or too much. Cold butter cut in with a pastry blender holds its shape better in the oven. If your butter is soft, pop the mixed topping in the fridge for 10 minutes before assembling.

Do I really need to cool it for 2 hours?

Yes :). I know it’s hard. If you cut it warm, the filling will run all over the plate instead of holding a slice.