Mix first four ingredients together and press into a 11 x 7 1/2 baking dish lined with parchment paper.
Preheat oven to 350 degrees F.
In large bowl sift together flour, cocoa powder, baking powder and salt. Set aside.
In a large bowl stir together butter and sugar. Ad and stir in vanilla and syrup. Add eggs, one at a time and mix well. Gently fold in flour mixture until well blended. Stir in chocolate chips. Spread batter on top of pretzel crust.
Bake 30-35 minutes or until brownies begin to pull away from sides of pan.
Cool brownies on counter 5 minutes. Place brownies, still in pan, into the fridge for 30 minutes to cool. Remove from fridge and finish cooling on counter.
Once completely cooled, lift parchment paper and brownies from pan. Flatten the parchment paper and cut brownies into squares.