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Apple Crisp Bars

Apple crisp bars with a buttery oat crumble base and top sandwiching a thick spiced apple filling. Baked at 375°F until the topping turns golden and the filling bubbles, then cooled completely for clean bar slices.
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Prep Time 25 minutes
Cook Time 40 minutes
Total Time 1 hour 5 minutes
Servings: 16 servings
Course: Dessert
Cuisine: American
Calories: 280
Ingredients Equipment Method Notes

Ingredients
  

For oat crumble base and top
  • 2 cup rolled oats
  • 1.5 cup all-purpose flour
  • 1 cup brown sugar packed
  • 1 tsp cinnamon
  • 0.25 tsp salt
  • 1 cup unsalted butter melted
For apple filling
  • 4 cup apples peeled and finely diced
  • 0.3333333333 cup granulated sugar
  • 1.5 tsp cinnamon
  • 0.25 tsp nutmeg
  • 2 tbsp cornstarch
  • 1 tbsp lemon juice

Equipment

  • 1 sheet pan

Method
 

Prep and make oat crumble
  1. Preheat oven to 375F and line a 9x13 pan with parchment.
  2. Combine rolled oats, all-purpose flour, brown sugar, cinnamon, and salt, then drizzle melted butter over and toss until evenly moistened.
Bake the base
  1. Press 2/3 of the oat mixture firmly into the prepared pan, then bake for 10 minutes.
Assemble and bake
  1. Toss diced apples with granulated sugar, cinnamon, nutmeg, cornstarch, and lemon juice, then spread over the hot base.
  2. Scatter the remaining oat crumble over the apples, then bake for 30 more minutes until the topping is golden and the filling bubbles.
Cool and slice
  1. Cool completely before slicing into bars.

Notes

For the cleanest bar slices, cool the pan completely at room temperature, then chill 1 hour if your kitchen is warm. Store airtight in the fridge up to 4 days; freeze bars up to 2 months. For a lighter option, use plant-based butter in the same amount (choose one that bakes well).