Preheat oven to 350 degrees F. Line a 13x9x1.5 inch sheet pan with parchment paper.
In large, microwavable safe mixing bowl melt together the butter, chocolate chips, & unsweetened chocolate in 30 second intervals stirring in between until fully smooth. Mix in the eggs, vanilla, & sugar. Let mixture cool for 5 minutes.
In separate large mixing bowl, combine flour, baking powder, & salt. Add the chocolate mixture to that bowl & stir to combine. Mix in the chocolate chips & pour into the sheet pan.
Bake for 30 minutes or until toothpick is inserted & comes out clean. Let cool completely on wire rack.
Top with jar of Edoughble & serve with ice cream, chocolate syrup, or other desired toppings!