Black and Tan Brownies

Ingredients:

• Tan Brownies:
• 6 tablespoons butter, softened
• 1 1/2 cups packed brown sugar
• 2 large eggs
• 1 teaspoon vanilla extract
• 4.5 ounces all-purpose flour (about 1 cup)
• 1 teaspoon baking powder
• 1/4 teaspoon salt
• 1/2 cup chopped pecans
• Cooking spray
• Black Brownies:
• 3 ounces unsweetened chocolate, finely chopped
• 4 tablespoons butter
• 1 cup granulated sugar
• 2 large eggs
• 1 teaspoon vanilla extract
• 1 cup Guinness Stout
• 4.5 ounces all-purpose flour (about 1 cup)
• 1/4 teaspoon salt