In large bowl, sift together flour, baking soda, and baking powder. Set aside.Advertisement
In an electric mixer, cream butter and brown sugar until fluffy. Mix in spices and salt, then eggs and molasses. Add flour mixture; mix on low. Divide dough into thirds; wrap in plastic. Chill 1 hour.
Preheat oven to 350 degrees. Line baking sheets with parchment. On a floured work surface, roll dough 1/8 inch thick. Cut into snowflake shapes. Transfer to prepared baking sheets, and refrigerate until firm, 15 minutes. Bake for 12 to 15 minutes, or until crisp but not darkened. Let cookies cool on wire racks, then decorate with royal icing, sugar, and dragees.