Unusual, light, spongey NOT FLAKEY pie crust? Ideas?

perhaps the crust was made more like a cookie - creaming softened/melted butter (or any other type of fat) with sugar instead of cold butter? that would eliminate the flakiness. if baking soda and baking powder were added, that would give it a spongy texture. maybe try using a biscotti recipe and bake the pie crust without the filling first to make it crispy?