INGREDIENTS
1 1/2 tbsp
Lemon, zest
5
Egg whites, large
5
Egg yolks, large
1/4 tsp
Baking powder
2 oz
Cornstarch
1/2 tsp
Cream of tartar
62 1/8 tsp
Granulated sugar
1/2 tsp
Salt
3/4 cup
Superfine sugar
6 oz
Unsifted all-purpose flour
3/4 tsp
Vanilla extract, pure
2 oz
Vegetable shortening, frozen
1 oz
Gingersnap cookies, finely ground
2 tbsp
Ice water
4 oz
Butter, unsalted