Mix butter, duck fat, vanilla extract, and lemon flavoring in one bowl.
In a separate bowl, mix all powders together.
Mix ingredients together with a spoon until coarse and clumpy.
Add your water until it forms a proper dough.
Using your hands, spread out the dough around the pan, making a cohesive bottom and crust.
(Optional) You may use a fork along the edges of the dough.
Bake in oven for 20-25 minutes at 375.
Remove from oven, add two cups of lemon curd to the pie.
Place pan in the fridge for at least 30 minutes, preferably an hour.