INGREDIENTS
1
Egg yolk, large
1/2 tsp
Peppermint oil
1 3/4 cups
All-purpose flour
2
lbs Chocolate couverture, semisweet
1/2 cup
Cocoa powder, unsweetened Dutch-process
1 cup
Powdered sugar
1/4 tsp
Salt, fine
1/2 tsp
Vanilla extract
2 sticks
unsalted butter, unsalted
1
Ice