First things first, preheat your oven to 350°F (175°C). While that’s warming up, grab a 9x9 inch baking pan and grease and flour it really well. This is super important so your beautiful bars don’t stick!

In a medium bowl, grab your softened butter, the lemon cake mix, and that egg. Now, mix it all together until it forms a nice, workable dough. It might seem a little crumbly at first, but keep mixing!

Take about half of that glorious dough and press it evenly into the bottom of your prepared baking pan. You want a nice, even base for our gooey layer.

In a separate, smaller bowl, whisk together your smooth lemon curd and that zesty lemon zest. Give it a good whisk until it’s all beautifully combined.

Now, carefully spread this lemon curd mixture evenly over the dough layer in your pan. Try to get it right to the edges!

Sprinkle those white chocolate chips all over the lemon curd. Get them in there good!

Next, drizzle that sweet condensed milk over the white chocolate chips. This is where the “gooey” part really kicks in, and it’s going to be amazing.

Take the remaining half of your dough and crumble it all over the top of the entire pan. You want a nice, rustic topping.

Pop the pan into your preheated oven and bake for about 25-30 minutes. You’re looking for that top to be lightly golden brown and the edges to look set.

This is the hardest part: let them cool completely in the pan before you even think about cutting them. I know, I know, but trust me, it’s worth the wait for those clean, perfect bars!