Preheat oven to 350°F (175°C).

In a large mixing bowl, cream together margarine, peanut butter, sugar, brown sugar, eggs, and vanilla until smooth and well combined.

In a separate bowl, whisk together flour, baking powder, and salt.

Gradually add the dry ingredients to the creamed mixture, mixing until just combined.

Do not overmix the dough.

Stir in peanut butter chips and toffee pieces (brickle).

Drop by heaping teaspoons onto ungreased cookie sheets or baking stone.

Bake for 12-15 minutes, or until golden brown.

Let cookies cool on baking sheets for a few minutes before transferring to wire racks to cool completely.