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Lemon Oatmeal Crumble Bars

Buttery oat crumble bars layered with a bright, tangy lemon filling for the perfect balance of sweet and citrus.
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Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings: 9 bars
Course: Dessert
Cuisine: American
Calories: 280
Ingredients Equipment Method Notes

Ingredients
  

Oat Crust & Topping
  • 1.5 cups rolled oats
  • 1.25 cups all-purpose flour
  • 0.75 cup brown sugar packed
  • 0.5 tsp salt
  • 0.5 tsp baking powder
  • 0.75 cup unsalted butter melted
Lemon Filling
  • 2 eggs large
  • 0.75 cup granulated sugar
  • 0.25 cup all-purpose flour
  • 0.5 cup fresh lemon juice
  • 1 tbsp lemon zest
  • 1 tsp vanilla extract

Equipment

  • Mixing bowls
  • 8x8 baking pan
  • Whisk
  • Oven

Method
 

  1. Preheat oven to 350°F (175°C) and line pan with parchment.
  2. Mix oats, flour, brown sugar, salt, and baking powder.
  3. Add melted butter and mix until crumbly.
  4. Press most mixture into pan and pre-bake 10 minutes.
  5. Whisk filling ingredients until smooth.
  6. Pour filling over crust and top with reserved crumble.
  7. Bake 20–25 minutes until set and golden.
  8. Cool completely, chill, slice, and serve.

Notes

Chill before slicing for best texture and clean edges.