Ingredients
Method
- Heat the oven to 350°F (177°C) and line an 8-inch square pan with parchment so it hangs over the sides.
- Beat the softened butter and brown sugar together until fluffy and blended, scraping the bowl as needed.
- Blend in the vanilla until fully incorporated.
- Add the flour, baking powder, salt, and oats, then mix just until a dry, crumbly mixture forms.
- Press a little over half of the mixture firmly into the bottom of the prepared pan to form the crust.
- Bake the crust for 12 minutes until just set but not browned.
- While the crust bakes, whisk together the sweetened condensed milk, lemon juice, and lemon zest until thick and smooth.
- Spread the lemon mixture over the hot crust, then scatter the remaining crumble evenly over the top.
- Return the pan to the oven and bake for 22–25 minutes, until the edges look lightly golden and set.
- Set the pan on a rack and let the bars cool completely before lifting them out and slicing into squares.
Nutrition
Notes
Bake these when you want your kitchen to smell like citrus and butter and comfort. They slice best once fully cooled, but sneaking a corner early is part of the joy.