Beat shortening and sugar until light and creamy.

Gradually add flour to form a smooth dough.

Add 1 tablespoon lime zest, vanilla extract, and fresh lime juice, mix well.

Place dough onto floured surface and divide into two. Shape each half into 8-inch log.

Wrap in plastic wrap and chill for at least 2 hours or overnight.

Preheat oven to 325 degrees. Line baking sheet with parchment paper.

Combine powdered sugar and remaining lime zest.

Slice each log into 1/2 inch slices, place on baking sheet about 2 inches apart.

Bake for 12-15 minutes or until golden brown around the edges.

Allow to cool a few minutes on baking sheet, while still warm dip cookies in lime zest sugar mixture.