01 -
Preheat oven to 175°C and line a 23×33 cm baking dish with parchment paper.
02 -
In a large bowl, beat the softened butter and granulated sugar until light and fluffy.
03 -
Add eggs, lemon zest, lemon juice, and vanilla extract; mix until fully incorporated.
04 -
In a separate bowl, whisk together flour, baking soda, baking powder, and salt.
05 -
Gradually add the dry mixture into the wet ingredients, stirring until smooth and uniform.
06 -
Evenly press the dough into the prepared baking dish.
07 -
Combine sugar, flour, and lemon zest. Cut in cold cubed butter using a pastry cutter or fork until crumbly.
08 -
Sprinkle the crumble mixture evenly over the cookie base.
09 -
Bake for 25 to 30 minutes until the topping turns golden and the center is set.
10 -
Allow to cool completely before drizzling with optional lemon glaze.