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Lemon Crumb Bars

Lemon Crumb Bars

These Lemon Crumb Bars are the perfect balance of sweet, buttery, and tangy, making them a must-try for anyone who loves bright citrus treats. With a soft oat crumble base, a creamy lemon filling, and a golden crumb topping, every bite delivers fresh flavor and irresistible texture. This easy dessert comes together with simple ingredients and minimal effort, making it perfect for busy days or last-minute gatherings. Whether you’re craving something refreshing or looking for a crowd-pleasing treat, these bars fit right in. Serve them chilled for the best texture and clean slices—trust me, they disappear fast!
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Prep Time 15 minutes
Cook Time 36 minutes
Course: Dessert, Snack, Summer Dessert
Cuisine: American
Ingredients Method Notes

Ingredients
  

  • Ingredients You’ll Need
  • For the crumb base & topping:
  • 1 ¼ cups all-purpose flour
  • 1 ¼ cups rolled oats old-fashioned style
  • ½ teaspoon salt
  • ½ teaspoon baking soda
  • ½ cup white sugar
  • ½ cup light brown sugar packed
  • ¾ cup unsalted butter melted
  • 1 teaspoon vanilla extract
  • For the lemon layer:
  • 1 can 14 oz sweetened condensed milk
  • 2 tablespoons finely grated lemon zest
  • ½ cup freshly squeezed lemon juice
  • 2 large egg yolks

Method
 

1. Prep the pan

Preheat your oven to 350°F (175°C). Lightly grease an 8×8-inch baking dish or line it with parchment for easy removal later.

    2. Make the crumble mixture

    In a large mixing bowl, combine flour, oats, salt, and baking soda. Add both sugars and mix until evenly distributed. Pour in the melted butter and vanilla, then stir everything together until a crumbly dough forms. It should hold together slightly when pressed.

      3. Build the base

      Take about half of the crumble mixture and press it firmly into the bottom of your prepared pan. Make sure it’s even—this is your foundation. Bake for 15 minutes until lightly set.

        4. Mix the lemon filling

        While the crust bakes, whisk together condensed milk, lemon zest, lemon juice, and egg yolks until smooth and creamy.

          5. Assemble the bars

          Remove the crust from the oven and pour the lemon mixture over it. Spread evenly. Sprinkle the remaining crumble mixture across the top—no need to press it down.

            6. Bake to perfection

            Return the pan to the oven and bake for 20–22 minutes, or until the top turns lightly golden.

              7. Chill before slicing

              Let the bars cool at room temperature, then transfer to the fridge until fully set.

                Important: For clean, sharp slices, chill thoroughly or pop them in the freezer for 20–30 minutes before cutting.

              Notes

              Serving Suggestions

              • Dust with powdered sugar for a pretty finish
              • Serve chilled for a refreshing bite
              • Pair with tea, coffee, or lemonade for a citrus overload (in the best way)
              • Add a dollop of whipped cream for extra indulgence

              Expert Tips (Don’t Skip These!)

              • Use fresh lemon juice for the brightest flavor—bottled just doesn’t hit the same
              • Press the base firmly so it holds together when sliced
              • Don’t overbake—the center should still have a slight jiggle
              • Chill completely before cutting to avoid messy bars

              Optional Upgrade (Highly Recommended 😏)

              Want to take these over the top?
              Dip the bottom half of chilled or frozen bars into melted white chocolate. Let them set on parchment paper in the fridge until firm. It adds a creamy, sweet contrast to the tangy lemon—chef’s kiss.

              Storage Tips

              Refrigerator:
              Store in an airtight container for up to 5 days. Keeps them firm and flavorful.
              Freezer:
              Wrap each bar individually and place in a freezer-safe bag. They’ll last up to 3 months. Thaw overnight in the fridge before serving.

              FAQs

              Can I use quick oats instead of rolled oats?
               Yes, but the texture will be softer and less crumbly.
              Why are my bars too soft?
               They likely need more chilling time. The filling sets as it cools.
              Can I make these ahead of time?
               Absolutely. They’re even better the next day once fully set.
              Can I double the recipe?
               Yes—use a 9×13-inch pan and adjust baking time slightly.

              Final Thoughts

              These Lemon Crumb Bars hit that perfect balance of buttery, sweet, and tangy. They’re simple enough for a weekday bake but impressive enough to share. Whether you’re making them for guests or just treating yourself, one thing’s guaranteed—they won’t last long.
              Lemon Crumb Bars - 3 Thumbnail