Cocoa Wafer Sandwiches

Adapted from Sugar by Anna Olson
Yield: 2 dozen sandwiches

Icing Filling
1 egg white
2 cups icing sugar
2-3 drops vanilla extract or peppermint extract
  1. Put egg white in a bowl.
  2. Beat in icing sugar, a few tablespoonsful at a time, until a soft dough forms.
  3. Continue to add remaining icing sugar until dough is no longer sticky.
  4. Mix in extract.

Cocoa Wafer Cookies
3/4 cup butter, at room temperature
1 cup icing sugar
6 tbsp cocoa powder
1 tsp vanilla
1 egg yolk
1 tbsp milk
1 1/2 cup flour
1/8 tsp salt
1/8 tsp baking powder
  1. Beat butter until smooth and fluffy.
  2. Stir in icing sugar and cocoa powder.
  3. Stir in vanilla, egg yolk, and milk.
  4. Add flour, salt, and baking powder. Blend until incorporated.
  5. Shape the dough into a disc and wrap in plastic wrap. Chill in refrigerator for 20 minutes.
  6. Preheat oven to 325F.
  7. Lightly dust the work surface with icing sugar.
  8. Roll the dough to 1/8 inch thick. Cut dough into desired shapes.
  9. Place cookies onto a parchment lined baking sheet.
  10. Bake 7 to 8 minutes or until the cookies can be lifted easily away from the parchment.
  11. Using an offset spatula, immediately transfer the cookies to rack to cool.
  12. To fill cookies, roll a teaspoon of icing filling into a ball and flatten a little.
  13. Sandwich between 2 cookies and press together to push icing to edges.