Preheat oven to 350°F.

Grease and flour a 9”x13” baking pan. Line bottom parchment paper (see note); set pan aside.

Using a medium saucepan, add the butter, chocolate and 1 cup of chocolate chips. Place over medium-low heat, stirring often, until butter and chocolate have fully melted; set pan aside to cool.

Using a large bowl, mix together the eggs, sugar and vanilla. Stir the egg mixture into the warm chocolate mixture.

Using a medium bowl, sift together the flour, baking powder and salt. Stir the flour mixture into the chocolate mixture.

Stir the chopped pecans and remaining ¾ cup of chocolate chips into the batter.

Pour batter into prepared baking pan. Bake at 350°F for 30-35 minutes, or until a toothpick inserted into the brownies comes out mostly clean.

Using a medium saucepan, add cream, butter and both sugars. Place over medium heat and cook, stirring occasionally, until mixture begins to boil. Continue boiling for 1 minute, stirring constantly.

Remove pan from heat and stir in remaining ingredients (pecans, powdered sugar, vanilla extract and bourbon); let mixture cool for 5 minutes.

Spread frosting evenly over brownies. Let cool for 1 hour, or until frosting has fully set.