
These apple cinnamon crumble bars are just the thing when you want a cozy dessert that is easy enough for weeknights but special enough for guests. They have layers of spiced apple filling nestled between buttery oat crumble with just the right amount of nostalgia. I make these every fall as soon as the orchard apples are ready and everyone in my house has come to expect a pan cooling on the counter.
My sister started asking for these to be her birthday cake every September. The recipe has followed me to every potluck and holiday table and always gets recipe requests.
Ingredients
- Old-fashioned rolled oats: give the crumble lots of texture and chew I always look for organic oats with a fresh aroma
- All-purpose flour: binds the crumble together and makes it sturdy Avoid bleached flour for a purer taste
- Unsalted butter: creates the ultimate rich and tender crumb Use high-quality European butter if you can
- Brown sugar: adds caramel flavor and soft moisture I prefer dark brown for deeper results
- Fresh apples: make the filling sweet and juicy Crisp baking apples like Granny Smith or Honeycrisp work best
- Cinnamon: infuses every bite with classic warm spice Always use fresh fragrant cinnamon and avoid any that smell dusty
- Granulated sugar: sweetens the filling Taste your apples first and adjust sugar to your liking
- Lemon juice: keeps apples bright and tart Squeeze fresh for best results
- Cornstarch: thickens the filling Use this to avoid soggy bars and keep layers tidy
Instructions
- Prepare the Crumble:
- Combine oats flour brown sugar and a pinch of salt in a large mixing bowl Mix until well integrated Add cold cubed butter and use your fingertips to rub it in until the mixture forms moist clumps Resist the urge to overwork or the topping will lose its crumbly texture
- Make the Apple Filling:
- Peel core and slice apples into thin wedges Toss them in a separate bowl with granulated sugar cinnamon a dash of lemon juice and cornstarch Stir until the apples are fully coated and glossy
- Press and Layer:
- Pour two thirds of the crumb mixture into a lined baking pan Use your hands or the bottom of a measuring cup to firmly press into an even base Make sure to reach all corners for even baking
- Add the Apple Layer:
- Spread all of the cinnamon apples evenly over the base Make sure they are in a single layer for even cooking and every bite gets apple
- Top and Bake:
- Crumble the remaining oat mixture loosely over the apples creating big and little clusters Bake in a preheated oven at 350 degrees Fahrenheit for about forty five minutes until golden and bubbling
- Cool and Slice:
- Let the bars cool completely in the pan before slicing to help set the filling Run a knife around the edges then lift and cut into even bars

There is something magic about how brown sugar and apples bake into something so nostalgic It always brings me back to my grandparents farmhouse where the first batch was hurried to the kitchen table and cut before it had cooled
Storage Tips
Store leftovers in an airtight container at room temperature for up to three days For longer storage keep in the fridge for up to one week Bars may be microwaved briefly to restore that straight from the oven texture Just keep in mind that the crumble remains crispiest when not sealed with plastic for long stretches
Ingredient Substitutions
You can use whole wheat flour for a nuttier flavor or swap in coconut sugar for the brown sugar Pears work in a pinch if you run out of apples or try a mixed apple and pear filling Gluten free flour blends also work well Use vegan butter to keep them dairy free
Serving Suggestions
Serve them on their own for a snack or dessert Add a scoop of vanilla ice cream or a dollop of whipped cream for extra indulgence Try them with a warm mug of chai or a drizzle of caramel for something truly special
Cultural and Seasonal Context
Crumble bars are based on classic fruit crumble desserts enjoyed across Europe and North America but in bar form they are portable and perfect for lunchboxes or picnics Fall apple harvest is the traditional time for these but they are just as welcome at spring potlucks

Let the bars cool fully for neat slices then share with friends for instant smiles and requests for the recipe.