Combine crust ingredients in a food processor. Mix until resembles wet sand. Pat into an 8-inch square baking dish that has been sprayed with non-stick spray. Bake crust at 375 degrees for 12 to 15 minutes. It will not brown.
Topping
Meanwhile, combine sugar, eggs, flour, lime, tequila, lime zest, baking powder, and salt. In an electric mixer, mix until frothy; pour over the crust. Bake at 375 degrees for 18 to 20 minutes or until light golden brown. sugar.
Allow it to cool for 5 to 10 minutes then dust the top with confectioners sugar.