Homemade Lemon Crumb Bars (Printable)

Buttery crumbs meet a zesty lemon filling for a bright, tangy, melt-in-mouth treat with a crisp texture.

# What You'll Need:

→ Crust and Crumb Topping

01 - 1 cup all-purpose flour
02 - 1/2 cup granulated sugar
03 - 1/2 teaspoon baking powder
04 - 1/4 teaspoon salt
05 - 1/2 cup unsalted butter, melted

→ Lemon Filling

06 - 2 large eggs
07 - 1 cup granulated sugar
08 - 1/4 cup fresh lemon juice
09 - Zest of 1 lemon
10 - 1/4 cup all-purpose flour
11 - 1/2 teaspoon baking powder
12 - Pinch of salt

→ Finishing

13 - Powdered sugar for dusting

# How to Make It:

01 - Preheat oven to 350°F. Grease a 9x9-inch baking pan or line with parchment paper.
02 - In a medium bowl, whisk together 1 cup flour, 1/2 cup sugar, 1/2 teaspoon baking powder, and 1/4 teaspoon salt.
03 - Pour melted butter into dry mixture and stir until moist and crumbly.
04 - Reserve 1/2 cup crumb mixture for topping. Press remaining mixture evenly into bottom of prepared pan.
05 - Bake crust for 10-12 minutes until lightly golden.
06 - While crust bakes, whisk together eggs and 1 cup sugar in a large bowl until well combined.
07 - Add lemon juice, lemon zest, 1/4 cup flour, 1/2 teaspoon baking powder, and pinch of salt. Whisk until smooth and lump-free.
08 - Remove crust from oven and pour lemon filling evenly over hot crust.
09 - Sprinkle reserved crumb mixture evenly over lemon filling.
10 - Return pan to oven and bake for 20-25 minutes until filling is set and topping is lightly browned.
11 - Remove from oven and allow to cool in pan for at least 1 hour.
12 - Transfer to refrigerator and chill for at least 1 additional hour before slicing into 16 bars.
13 - Dust with powdered sugar if desired before serving.

# Expert Tips:

01 -
  • The crumb topping shatters in your mouth while the filling stays perfectly creamy and tart, hitting that sweet-tangy balance that keeps you reaching for another piece.
  • They're ready faster than you'd think, and they actually taste better after a day in the fridge when all the flavors settle into place.
02 -
  • Don't skip the pre-bake of the crust; I learned this the hard way when I went straight to pouring filling on raw dough and ended up with a soggy bottom that took forever to set.
  • Fresh lemon juice really does make a difference, and the zest is what transforms these bars from simply sweet to genuinely memorable.
03 -
  • Squeeze your lemon juice fresh right before using it, and make sure to zest before you cut the lemon in half; it's so much easier that way.
  • If your filling seems too runny when you pour it, don't panic; it sets up beautifully in the oven, and that slight jiggle in the center when you remove it is exactly what you want.
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