Preheat the oven to 350. Line baking sheets with parchment paper
In a bowl whisk toget ther flour, baking powder and salt
In a large bowl beat the butterr and both sugars until light and fluffy
Add the egg, egg yolk and vanilla and beat in
Stir in the flour mixture just until well combined but don't overmix
Mix in toffee chocolate bits
Roll into 1 inch balls and place 2 inches apart on prepared pans
Bake 13 to 17 minutes until puffed and set and very light golden. Don't over bake for chewy cookies. Let cool in pan 5 minutes then transfer to wire racks to cool completely
