Caramel Apple Crumb Bars. Recipe

I can’t resist these Apple Crumb Bars with buttery shortbread, cinnamon-spiced apples, crumbly oat topping, and salted caramel in every bite. They’re the fall dessert that disappears fast, so I always sneak one early.

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I’m obsessed with these Caramel Apple Crumb Bars because every bite has that buttery base, jammy middle, and messy crumbly top I keep picking at before the pan even cools. I love how the apples turn soft and glossy, while the drizzle brings that sticky, salty bite from flaky sea salt.

But the best part? The layers don’t behave too neatly, and I’m into that.

A little crumble falls off, caramel gets on my fingers, and I still go back for another square. And maybe one more after that.

This is the fall dessert I never pretend to share anyway.

Ingredients

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Flour gives the crust that sturdy, cookie-like bite you’ll want under juicy apples.
Butter makes everything rich, tender, and honestly, kind of irresistible.
Egg yolk helps the shortbread hold together without turning tough.
Vanilla adds cozy bakery vibes, even before the apples show up.
Apples bring the soft, sweet-tart middle that makes these bars feel homemade.
Lemon juice keeps the filling bright, not flat or overly sweet.
Cinnamon and nutmeg make it taste like fall walked into your kitchen.
Cornstarch thickens the apple juices so the bars don’t get soupy.
Oats add chewy crunch on top, basically the best crumbly blanket.
Brown sugar brings deep caramel notes before the drizzle even happens.
Plus, salted caramel makes these messy, sweet, and totally worth sticky fingers.

Ingredient Quantities

For the shortbread crust:
- 1 1/2 cups (190 g) all purpose flour
- 1/2 cup (100 g) granulated sugar
- 1/4 teaspoon fine salt
- 1/2 cup (115 g) cold unsalted butter, cut into pieces
- 1 large egg yolk
- 1 teaspoon pure vanilla extract

For the apple filling:
- 3 medium apples, peeled, cored and thinly sliced (about 3 cups / 400 g)
- 1/4 cup (50 g) granulated sugar
- 1/4 cup (50 g) packed light brown sugar
- 1 tablespoon fresh lemon juice
- 1 teaspoon ground cinnamon
- 1/4 teaspoon ground nutmeg
- 1 tablespoon cornstarch
- 1 teaspoon vanilla extract

For the oat crumble topping:
- 1 cup (90 g) old fashioned rolled oats
- 3/4 cup (95 g) all purpose flour
- 1/2 cup (110 g) packed light brown sugar
- 1/4 cup (50 g) granulated sugar
- 1/2 teaspoon ground cinnamon
- 1/4 teaspoon fine salt
- 3/4 cup (170 g) cold unsalted butter, cut into pieces

For the salted caramel drizzle:
- 1 cup (200 g) granulated sugar
- 6 tablespoons (85 g) unsalted butter, cut into pieces
- 1/2 cup (120 ml) heavy cream, room temperature
- 1 teaspoon flaky sea salt or to taste

How to Make this

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1. Preheat oven to 350 F and line a 9×9 inch baking pan with parchment, leaving an overhang for easy removal.

2. Make the shortbread crust: whisk together 1 1/2 cups flour, 1/2 cup granulated sugar and 1/4 teaspoon salt in a bowl; cut in 1/2 cup cold butter until mixture resembles coarse crumbs; stir in 1 egg yolk and 1 teaspoon vanilla until dough comes together, then firmly press into the prepared pan.

3. Bake the crust for 15 to 18 minutes until set and just beginning to turn golden; remove from oven and leave oven on.

4. Prepare the apple filling: toss 3 cups thinly sliced apples with 1/4 cup granulated sugar, 1/4 cup packed light brown sugar, 1 tablespoon lemon juice, 1 teaspoon cinnamon, 1/4 teaspoon nutmeg, 1 tablespoon cornstarch and 1 teaspoon vanilla until evenly coated.

5. Spread the apple mixture evenly over the pre-baked crust.

6. Make the oat crumble topping: in a bowl combine 1 cup rolled oats, 3/4 cup flour, 1/2 cup packed light brown sugar, 1/4 cup granulated sugar, 1/2 teaspoon cinnamon and 1/4 teaspoon salt; cut in 3/4 cup cold butter until large crumbs form.

7. Sprinkle the oat crumble evenly over the apple layer.

8. Bake for 35 to 40 minutes until the topping is golden and the apple filling is bubbly; remove from oven and cool on a wire rack for at least 30 minutes.

9. While bars cool, make the salted caramel drizzle: heat 1 cup granulated sugar in a medium heavy-bottomed saucepan over medium heat, swirling occasionally until fully melted and amber in color; immediately add 6 tablespoons butter and whisk until melted, then slowly pour in 1/2 cup room temperature heavy cream while whisking; boil 1 minute, remove from heat and stir in 1 teaspoon flaky sea salt; cool slightly.

10. Drizzle the warm but not piping hot caramel over the cooled bars, chill until set if desired, then lift from pan, slice into bars and serve.

Equipment Needed

1. 9×9 inch baking pan lined with parchment paper
2. Mixing bowls (small and medium)
3. Measuring cups and spoons
4. Whisk and rubber spatula
5. Pastry cutter or two forks for cutting in butter
6. Sharp knife and cutting board for apples
7. Medium heavy bottomed saucepan for caramel
8. Wire cooling rack
9. Oven mitts or heatproof gloves

FAQ

Can I make the bars ahead of time and how should I store them? Yes. Store cooled bars in an airtight container at room temperature for up to 2 days or refrigerate for up to 5 days. Rewarm gently in a low oven before serving for best texture.

Can I use frozen or pre-sliced apples? Fresh apples are best for texture, but thawed, well-drained frozen apple slices can work. Pat dry to remove excess moisture and stir in the cornstarch so the filling is not watery.

How can I prevent a soggy crust? Use cold butter in the crust and press it firmly into the pan to create a compact layer. Toss apple slices with cornstarch and do not overfill the pan. Bake until the crumble topping is deeply golden to help set the filling.

What apple varieties are best? Choose firm, slightly tart apples that hold their shape, such as Granny Smith, Braeburn, Honeycrisp, or Pink Lady. Mix varieties if you like a balance of sweet and tart.

How do I make the caramel drizzle smooth and not grainy? Cook the sugar evenly until it melts and becomes an amber color without stirring too vigorously. Add the butter and then the room temperature cream slowly while stirring to combine. If it crystallizes, briefly heat and stir until smooth.

Can I make the recipe gluten free or dairy free? For gluten free: use a 1-to-1 gluten free flour blend for the crust and topping and ensure oats are certified gluten free. For dairy free: use vegan butter and a dairy free cream substitute for the caramel, and reduce heat slightly when combining to prevent splitting.

Caramel Apple Crumb Bars. Recipe Substitutions and Variations

All purpose flour
- Whole wheat pastry flour: 1 to 1, gives nuttier flavor and slightly denser crust
- Gluten free 1-to-1 flour blend: 1 to 1, use a blend with xanthan gum for structure
- Almond flour: replace up to 25 percent of the AP flour for a tender, moist crumb; reduce baking time slightly
Unsalted butter
- Salted butter: use same amount and omit or reduce added salt elsewhere
- Coconut oil (solid): use 1 to 1, yields slightly coconut flavor and firmer texture when chilled
- Vegan butter: use 1 to 1 for dairy free option, choose a stick-style block for similar handling
Heavy cream (for caramel)
- Full fat coconut milk: use equal volume, gives subtle coconut note and works for dairy free caramel
- Half and half: use equal volume for a lighter, slightly thinner caramel
- Evaporated milk: use equal volume, reduces richness and thickens nicely when cooled
Old fashioned rolled oats (topping)
- Quick oats: use equal weight, yields finer texture and quicker browning
- Quinoa flakes: use equal weight for a gluten free, slightly nutty crunch
- Chopped toasted nuts (walnuts or pecans): replace up to half the oats by volume for extra crunch and flavor

Pro Tips

1) Choose your apples wisely. Use a mix of tart and sweet varieties, for example Granny Smith plus Honeycrisp or Fuji, so the filling has bright flavor and does not become cloying as it bakes.

2) Prevent a soggy crust by tossing the sliced apples with the cornstarch and lemon juice thoroughly and letting them sit for 5 to 10 minutes before spreading. Also press the shortbread firmly and bake until it is just golden so it forms a sturdy base.

3) Keep the butters cold when you cut them into both the crust and the crumble. Cold butter yields flakier shortbread and big, crunchy crumble clusters rather than a greasy mash.

4) Watch the caramel like a hawk. Once the sugar starts to melt it can go from amber to burnt very fast. Remove the pan from the heat as soon as it reaches a deep amber, and add the cream slowly while whisking to avoid splatters. Let the caramel cool until warm but not piping hot before drizzling so it does not sink into the bars.

5) Finish and serve with confidence. Cool the bars at least 30 minutes, then chill briefly if you want cleaner slices. Keep extra caramel on hand for drizzling at the table and sprinkle the top with a little flaky sea salt right before serving for contrast.

Recipe by Tina Bueller

0.0 from 0 votes

Servings

servings

Calories

582

kcal

Equipment: 1. 9×9 inch baking pan lined with parchment paper
2. Mixing bowls (small and medium)
3. Measuring cups and spoons
4. Whisk and rubber spatula
5. Pastry cutter or two forks for cutting in butter
6. Sharp knife and cutting board for apples
7. Medium heavy bottomed saucepan for caramel
8. Wire cooling rack
9. Oven mitts or heatproof gloves

Ingredients

For the shortbread crust:
1 1/2 cups (190 g) all purpose flour
1/2 cup (100 g) granulated sugar
1/4 teaspoon fine salt
1/2 cup (115 g) cold unsalted butter, cut into pieces
1 large egg yolk
1 teaspoon pure vanilla extract
For the apple filling:
3 medium apples, peeled, cored and thinly sliced (about 3 cups / 400 g)
1/4 cup (50 g) granulated sugar
1/4 cup (50 g) packed light brown sugar
1 tablespoon fresh lemon juice
1 teaspoon ground cinnamon
1/4 teaspoon ground nutmeg
1 tablespoon cornstarch
1 teaspoon vanilla extract
For the oat crumble topping:
1 cup (90 g) old fashioned rolled oats
3/4 cup (95 g) all purpose flour
1/2 cup (110 g) packed light brown sugar
1/4 cup (50 g) granulated sugar
1/2 teaspoon ground cinnamon
1/4 teaspoon fine salt
3/4 cup (170 g) cold unsalted butter, cut into pieces
For the salted caramel drizzle:
1 cup (200 g) granulated sugar
6 tablespoons (85 g) unsalted butter, cut into pieces
1/2 cup (120 ml) heavy cream, room temperature
1 teaspoon flaky sea salt or to taste

Directions

Preheat oven to 350 F and line a 9×9 inch baking pan with parchment, leaving an overhang for easy removal.
Make the shortbread crust: whisk together 1 1/2 cups flour, 1/2 cup granulated sugar and 1/4 teaspoon salt in a bowl; cut in 1/2 cup cold butter until mixture resembles coarse crumbs; stir in 1 egg yolk and 1 teaspoon vanilla until dough comes together, then firmly press into the prepared pan.
Bake the crust for 15 to 18 minutes until set and just beginning to turn golden; remove from oven and leave oven on.
Prepare the apple filling: toss 3 cups thinly sliced apples with 1/4 cup granulated sugar, 1/4 cup packed light brown sugar, 1 tablespoon lemon juice, 1 teaspoon cinnamon, 1/4 teaspoon nutmeg, 1 tablespoon cornstarch and 1 teaspoon vanilla until evenly coated.
Spread the apple mixture evenly over the pre-baked crust.
Make the oat crumble topping: in a bowl combine 1 cup rolled oats, 3/4 cup flour, 1/2 cup packed light brown sugar, 1/4 cup granulated sugar, 1/2 teaspoon cinnamon and 1/4 teaspoon salt; cut in 3/4 cup cold butter until large crumbs form.
Sprinkle the oat crumble evenly over the apple layer.
Bake for 35 to 40 minutes until the topping is golden and the apple filling is bubbly; remove from oven and cool on a wire rack for at least 30 minutes.
While bars cool, make the salted caramel drizzle: heat 1 cup granulated sugar in a medium heavy-bottomed saucepan over medium heat, swirling occasionally until fully melted and amber in color; immediately add 6 tablespoons butter and whisk until melted, then slowly pour in 1/2 cup room temperature heavy cream while whisking; boil 1 minute, remove from heat and stir in 1 teaspoon flaky sea salt; cool slightly.
Drizzle the warm but not piping hot caramel over the cooled bars, chill until set if desired, then lift from pan, slice into bars and serve.

Notes

Below you’ll find my best estimate of this recipe’s nutrition facts. Treat the numbers as a guide rather than a rule—great food should nourish both body and spirit. Figures are approximate, and the website owner assumes no liability for any inaccuracies in this recipe.