01 -
Preheat oven to 350°F. Cover an 8x8-inch baking pan with parchment paper, making sure the paper spills over on two sides.
02 -
Microwave butter to melt it. Combine with the sugar, baking powder, and a pinch of salt. Stir in the flour and oats. Save one cup for the top.
03 -
Use the rest of the mixture to cover the bottom of the pan. Bake for 12–14 minutes until it turns lightly golden.
04 -
Blend the sweetened condensed milk with the lemon juice, zest, and remaining salt. Stir until silky.
05 -
Pour the lemon mix on the crust while it’s hot. Sprinkle the reserved crumble on top. Bake an extra 22–24 minutes till edges are golden.
06 -
Let it cool down entirely (1.5 hours). If you’d like, chill it for 30 minutes to set firmly. Cut into 12 squares.