Base
1 3/4 cups flour
1/2 cup powdered sugar
1 cup softened butter
Filling
4 eggs
1 1/2 cups sugar
1/4 cup flour
1/2 teaspoon baking powder
1/3 cup frozen margarita mix concentrate, thawed
2 teaspoons grated lime peel
1 tablespoon powdered sugar
Base
Heat oven to 350°F. Mix ingredients together till crumbly. With floured fingers, press mixgture firmly into bottom of ungreased 9x13 inch baking pan. Bake 20-25 minutes till light golden brown.
Filling
Beat eggs slightly. Mix in sugar, flour and baking powder till well blended. Stir in margarita mix and lime peel. Remove pan from oven. Pour filling over warm base. Bake 18-22 minutes till top is golden brown and filling is set. Cool completely, 1 hour. Before serving, sprinkle bars with powdered sugar.
Nicole's Note
Very similar in ingredients to Bob's Tart Key Lime Bars. These had virtually no lime flavor at all. Lime juice would be a better choice than margarita mix. Maybe add crushed pretzels to the base as well.