Heat oven to 350 F.

In medium bowl, combine flour, cocoa powder, baking soda and salt.

In large bowl, beat butter and sugars until light and fluffy. Add vanilla and eggs, one at a time, beating well after each addition. Gradually add flour mixture to butter mixture, mixing to make a smooth dough.

Place dough into cookie press and press cookies onto ungreased cookie sheet. Bake 10-12 minutes or until edges are slightly browned. Cool cookies on pan on cooling grid 2 minutes. Remove from pan; cool completely on grid.

Sandwich cookies together with Peppermint Decorating Icing.