Step 1

Preheat oven to 350 degrees F. Line a 9 x 13-inch baking pan with parchment paper, leaving an overhand like a sling.

Step 2

Pour the cake mix into a large mixing bowl. Whisk in the lemon curd until combined with the cake mix.

Step 3

Evenly spread the batter into the pan.

Step 4

Bake for 35-40 minutes, until the cake is set and golden.

Step 5

Let cool before slicing. Sprinkle the confectioner's sugar over the lemon bars, if desired.