Milano Cookies

Directions

1. 1
   Preheat the oven to 180 degrees Celsius.
2. 2
   Using an electric mixer, cream the butter and the sugar.
3. 3
   Slowly add the egg whites, vanilla, and lemon zest.
4. 4
   Add the flour and continue mixing. Do not over-beat.
5. 5
   Place in a pastry bag with a smooth tip. Make 2.5-centimeter-wide and 5-centimeter-long cookies, with a 5-centimeter separation between each.
6. 6
   Bake for 10 minutes until the edges are golden brown. Let them cool.
7. 7
   For the filling, heat the heavy cream until it boils. Turn the heat off and pour over the chocolate. Let it rest for 1 minute, then stir to melt the chocolate. Add the orange zest and mix.
8. 8
   Spread a thin layer of chocolate filling on the flat side of each cookie, then join cookies into pairs.