In a mixing bowl, cream butter and sugar. Beat in eggs and vanilla. Combine the flour, cocoa, baking powder, bi carb soda and salt; gradually add to the creamed mixture. Roll dough into 4 cm balls. Place 7 cm apart on lightly greased baking trays.
Insert a wooden stick into each biscuits. Flatten with a glass dipped in sugar. Pinch top of biscuits to form ears. For whiskers, press a fork twice into each biscuit. Bake at 175 degree C for 10-12 minutes or until biscuits are set.
Remove from the oven and immediately press in the lollies for eyes and the noses. Remove to wire racks to cool.