Preheat the oven to 350* and lightly grease a 9x13 pan and set aside
Place the baking chocolate and shortening into a medium size saucepan and melt the two together, stirring continuously over medium-low heat
Remove the saucepan from the stovetop and quickly stir in the sugar and vanilla extract with a wooden spoon
One at a time, add the eggs to the mixture, vigorously whisking each egg before adding the next Continue whisking until the batter is glossy
Add in the flour, baking powder and salt. Mix to combine
Gently fold in the chocolate chips, pretzels, and caramel bits
Pour the mixture into the prepared baking pan and bake for 25-30 minutes
Let the brownies cool 10-15 minutes before slicing
Serve warm. Store remaining brownies in a closed container at room temperature.
If serving later, reheat single brownies for 20-30 seconds in a microwave before serving
