In a bowl whisk together flour, cocoa powder, baking powder and salt.
In another bowl with an electric mixer beat together butter and sugar until light
and fluffy and beat in rum. Beat in eggs, one at a time, beating well after each
addition. Stir in flour mixture and mix just until dough is blended well.
1/4-cup measures of dough into balls and arrange about 3 inches apart on nonstick
Bake cookies in middle of oven until tops begin to crack, about 15
minutes, and transfer with a metal spatula to wire racks to cool.