1. Line 13x9 dish with parchment. Preheat oven to 350F.
2. Set aside 3 Tbsp. lemon curd for another use. Of remaining lemon curd, mix 1/4 c with cookie mix and 8 Tbsp. butter. Press into pan, and bake 15 min.
3. Stir together 4 Tbsp. melted butter and remaining lemon curd. Spoon over crust and spread.
4. Bake until set, about 25 min.
5. Let cool completely. Dust with powdered sugar, as desired.