Preheat oven to 350°.
Line a 9x13 baking pan with nonstick foil.
Beat butter & sugar until fluffy.
Add eggs and vanilla.
On low, add flour, baking powder and salt.
By hand, stir in the twix candies and chips.
Press in the pan and bake 25-30 mins.
Middle should still be soft.
Cool and cut!