Chocolate Peanut Butter Pretzel Brownies

Ingredients

• 8 tablespoons (1 stick) unsalted butter
• 2 ounces unsweetened chocolate, coarsely chopped
• 4 ounces semi-sweet chocolate, coarsely chopped
• 1 teaspoon instant coffee (optional)
• 3/4 cup granulated sugar
• 3 large eggs
• 1 teaspoon pure vanilla extract
• 2/3 cups all-purpose flour
• 1/2 teaspoon baking powder
• 1/4 teaspoon salt
• coarse sea salt for topping
• 4 tablespoons unsalted butter, melted
• 1/2 cup powdered sugar
• 3/4 cup smooth peanut butter, i prefer natural peanut butter
• 1/4 teaspoon salt
• 1/2 teaspoon vanilla extract
• large handful of pretzel sticks