PREHEAT oven to 350˚F.
BEAT butter and sugar in a large bowl until light and fluffy. Add eggs and beat well.
STIR together flour, baking soda and salt in a small bowl. Gradually beat into butter mixture until well blended.
ADD currants, pecans and zest if using. Mix well.
DROP by rounded tablespoonfuls 2 inches apart on a lightly buttered or parchment lined baking sheet.
BAKE 12-14 minutes until golden brown on edges. Remove with a spatula to a wire rack to cool.