01 -
Preheat the oven to 350°F (175°C) and grease an 8x8-inch baking pan with baking spray.
02 -
In a large bowl, combine the flour, oats, salt, and baking soda.
03 -
Stir in the granulated sugar and brown sugar until evenly distributed.
04 -
Mix the melted butter and vanilla extract, then add them to the dry ingredients. Stir until well combined and crumbly.
05 -
Press half of the mixture firmly into the bottom of the prepared pan to create an even crust.
06 -
Bake for 15 minutes until slightly firm but not browned.
07 -
While the crust is baking, whisk together the condensed milk, lemon zest, lemon juice, and egg yolks until smooth and well combined.
08 -
Once the crust is done, pour the lemon filling over it. Sprinkle the remaining crumble mixture evenly over the top.
09 -
Bake for an additional 20–22 minutes, until the topping is lightly golden and the filling is just set.
10 -
Allow the bars to cool completely at room temperature, then refrigerate until firm, at least 2 hours.
11 -
For cleaner slices, chill the bars thoroughly or freeze briefly before cutting to prevent the filling from oozing.