These apple crumble bars have a buttery shortbread style crust, a spiced Granny Smith filling, and a crumbly oat topping, all made from one simple dough.
You press two thirds of the dough into the pan for the base and scatter the rest on top, so there is no separate topping to make. Plan on about 65 minutes plus cooling, and cut into nine squares that are sturdy enough to eat by hand.
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Why This Apple Crumble Bars Recipe Works
One dough does double duty. It becomes both the crust and the crumble, which cuts the work and the dishes while keeping the whole bar tasting cohesive.
Granny Smith apples keep their tang and bite in the oven, so the filling tastes like fruit rather than just sugar. A little cinnamon and nutmeg round it out.
Bars are easier to share than a scoopable dessert. They slice neatly, travel well, and can be eaten without a plate, which makes them ideal for gatherings and lunch boxes.
Ingredients for Apple Crumble Bars
- 8 tbsp unsalted butter (1 stick), melted
- 2 cups all purpose flour
- 1/2 cup granulated sugar
- 1/2 tsp baking powder
- 1 pinch kosher salt
- 1 large egg
- 1/3 cup old fashioned rolled oats
- 4 cups diced Granny Smith apples (3 to 4 large), cut into 1/3 inch dice
- 1/4 cup all purpose flour (for the filling)
- 1/4 cup granulated sugar (for the filling)
- 1/2 tsp ground cinnamon
- 1/4 tsp ground nutmeg
- 2 tbsp salted caramel sauce, for serving (optional)
Melted butter. Stirring melted butter into the flour means no mixer or cutting in cold butter, and it gives the crust a rich, tender crumb.
All purpose flour. Flour gives the base structure. Mix until no dry streaks remain so the crust bakes evenly.
Granny Smith apples. Dice them small, about 1/3 inch, so they soften fully in the bake time and the bars cut cleanly.
Cinnamon and nutmeg. Nutmeg is strong, so a small pinch of 1/4 teaspoon is enough to add warmth without taking over.
Rolled oats. Oats mixed into the topping add chew and a slightly toasty flavor.
How to Make Apple Crumble Bars
1. Prepare the pan. Heat the oven to 350 degrees F. Grease an 8 inch square pan and line it with parchment, leaving an overhang on two sides.
2. Mix the dough. Stir the melted butter, flour, sugar, baking powder, and salt until no white flour remains, then stir in the egg until the dough comes together.
3. Press the base. Set aside about one third of the dough for the topping, then lightly press the rest into the bottom of the pan. Bake 15 minutes until slightly golden and cool 5 minutes.
4. Toss the apples. While the base cools, mix the diced apples with the filling flour, sugar, cinnamon, and nutmeg in a bowl.
5. Fill and top. Spread the apples over the base. Mix the oats into the reserved dough, crumble it over the apples, and bake 25 to 30 minutes until golden and the apples are tender.
6. Cool and cut. Cool in the pan until firm enough to handle, then lift out with the parchment and cut into 9 bars.
How to Serve Apple Crumble Bars
Serve the bars at room temperature or slightly warm, with a drizzle of caramel sauce and a scoop of vanilla ice cream if you like. Pair them with cinnamon streusel coffee cake for a brunch table, or add chocolate chunk brownies and chocolate chip cookies for a dessert platter. A slice of cheesecake makes a rich contrast.
How to Store and Reheat Apple Crumble Bars
Store the bars in an airtight container at room temperature for up to 2 days, or refrigerate for up to 5 days. For longer storage, wrap individual bars well and freeze for up to 3 months, then thaw overnight in the refrigerator. Warm briefly in a low oven or microwave before serving.
Tips and Variations for Apple Crumble Bars
Dice evenly. Small, even apple pieces cook through and make cleaner slices.
Press lightly. Pressing the base too firmly makes it dense, so use a light, even pressure.
Do not skip the pre bake. The short bake sets the base so the apple juices do not make it soggy.
Line the pan. Parchment with an overhang lets you lift the whole slab out for tidy cutting.
Cool before cutting. The filling sets as it cools, so patience gives sharper squares.
Add nuts. Chopped pecans or walnuts folded into the topping add crunch.
Serve with caramel. A little salted caramel sauce on top adds a sweet finish.
Handle eggs safely. Do not taste the raw dough, and see egg handling guidance from Montana State University Extension for more on egg safety.
Frequently Asked Questions About Apple Crumble Bars
Can I use different apples in apple crumble bars?
Yes. Granny Smith holds up ideal, but Braeburn or Braeburn work if you prefer a sweeter bar.
How do I keep apple crumble bars from falling apart?
Let them cool in the pan before lifting and slicing, since the filling firms up as it cools.
Can I make apple crumble bars ahead of time?
Yes. Bake them a day ahead, cool completely, cover, and store. They are even easier to cut the next day.
Do I need the egg?
The egg binds the dough, so leaving it out gives a more crumbly base.
Can I use a 9 inch pan?
You can, but the bars will be thinner and bake a little faster, so check them a few minutes early.
Apple Crumble Bars
Equipment
- 8 Inch Square Baking Pan
- Parchment paper
- Mixing bowls
- Sharp knife
Ingredients
- 8 tbsp unsalted butter 1 stick, melted, for the base and topping
- 2 cup all purpose flour for the base and topping
- ½ cup granulated sugar for the base and topping
- ½ tsp baking powder for the base and topping
- 1 pinch kosher salt for the base and topping
- 1 large egg for the base and topping
- ⅓ cup old fashioned rolled oats for the topping
- 4 cup diced Granny Smith apples 3 to 4 large apples cut into 1/3 inch dice, for the filling
- ¼ cup all purpose flour for the filling
- ¼ cup granulated sugar for the filling
- ½ tsp ground cinnamon for the filling
- ¼ tsp ground nutmeg for the filling
Instructions
- Prep the pan. Heat the oven to 350 degrees F. Grease an 8 inch square pan and line it with parchment, leaving an overhang.
- Make the dough. Stir the butter, flour, sugar, baking powder, and salt until no white flour remains, then stir in the egg.
- Bake the base. Press about two thirds of the dough lightly into the pan and bake 15 minutes until slightly golden. Cool 5 minutes.
- Make the filling. Toss the diced apples with the flour, sugar, cinnamon, and nutmeg and spread over the base.
- Top and bake. Mix the oats into the remaining dough, crumble it over the apples, and bake 25 minutes more until golden and the apples are tender.
- Cool and cut. Cool in the pan until firm, lift out with the parchment, and cut into 9 bars.
