In large bowl, stir together cream cheese and 2 tsp. lime zest until blended. Using whisk, gradually whisk in condensed milk until blended. Whisk in evaporated milk and lime juice until smooth and thick. Using spoon, spread ½ cup cream cheese mixture on bottom of 8” glass baking dish.
Top cream cheese mixture with 9 Maria cookies, arranging in single layer. Gently spread cookies with about ¾ cup cream cheese mixture. Repeat layering 3 times more, using ¾ cup cream cheese mixture and 9 cookies per layer, ending with remaining cream cheese mixture. Cover cake with plastic wrap; transfer to refrigerator. Chill at least 8 hours, or overnight. Garnish cake with lime zest, if desired, before serving.