Preheat the oven and line a 9x13 baking dish with parchment paper.
Using a standing mixer, cream together the butter, brown sugar, sugar, egg and vanilla until combined.
In a large bowl, whisk together the flour, baking soda, baking powder and salt until combined.
Gradually whisk in the dry ingredients into the wet until combined.
Fold in ¾ C espresso chips.
Fold in ¾ C semi sweet chocolate chips.
Then fold in ¾ C toffee baking bites.
Press the dough into the baking dish.
Sprinkle the remaining espresso chips, semi sweet chocolate chips and toffee bits on top.
Bake in the oven for 20-25 minutes or until lightly brown.
Remove and allow to cool completely before cutting into bars.