Guittard Butterscotch Brownies | World Wide Chocolate

Ingredients

• 2 cups All-Purpose Flour ((unsifted) )
• 1½ tsp Baking Powder
• ½ tsp Salt
• 2 cups Guittard 46% Semisweet Dark Chocolate Baking Chips ((divided))
• 2 cups Guittard Butterscotch Baking Chips ((divided))
• 2 tbsp Water ((divided))
• ½ cup Unsalted Butter
• 1 cup Light Brown Sugar ((firmly packed))
• 3 Large Eggs
• 1 tsp Prova Gourmet Madagascar Bourbon Vanilla Extract
• ¾ cup Chopped Walnuts ((optional))