Ingredients

1 1/4 cups all-purpose flour 

2 tablespoons unsweetened cocoa powder 

6 tablespoons unsalted butter, chilled 

3 large egg yolks 

1/3 cup sugar 

1/2 teaspoon salt 

1/2 teaspoon pure vanilla extract 

Preparation

In a large bowl, sift together flour and cocoa powder. Set aside.

In small bowl, using a fork, combine remaining ingredients; add to cocoa mixture. Rub mixture with fingers until it holds together without large lumps of butter remaining. Turn mixture onto clean surface; knead until smooth, about 1 minute. Form into disc, wrap in plastic; chill 30 minutes.