Peanut Butter Swirl Brownies

• 8 tablespoons (1 stick) unsalted butter, cut into small pieces, plus more for the pan
• 2 ounces good-quality unsweetened chocolate, coarsely chopped
• 4 ounces good-quality semisweet chocolate, coarsely chopped
• 2/3 cup all-purpose flour
• 1/2 teaspoon baking powder
• 1/4 teaspoon salt
• 3/4 cup granulated sugar
• 3 large eggs
• 2 teaspoons pure vanilla extract
• 4 tablespoons unsalted butter, melted
• 1/2 cup confectioners sugar
• 3/4 cup smooth peanut butter
• 1/4 teaspoon salt
• 1/2 teaspoon pure vanilla extract

1. Preheat the oven to 325F.
2. Line a buttered 8-inch-square baking pan with foil or parchment paper, allowing 2 inches to hang over the sides.
3. Butter the lining (excluding the overhang); set the pan aside.
4. Make the batter: Put the butter and chocolates in a heatproof medium bowl set over a pan of simmering water; stir until melted.
5. Let cool slightly.
6. Whisk together the flour, baking powder, and salt in a separate bowl, and set aside.
7. Whisk the granulated sugar into the chocolate mixture.
8. Add the eggs, and whisk until the mixture is smooth.
9. Stir in the vanilla.
10. Add the flour mixture; stir until well incorporated.
11. Make the filling: Stir together the butter, confectioners sugar, peanut butter, salt, and vanilla in a bowl until smooth.
12. Pour one-third of the batter into the prepared pan, and spread evenly with a rubber spatula.
13. Place dollops of filling (about 1 tablespoon each) about 1 inch apart on top of the batter.
14. Drizzle the remaining batter on top, and gently spread to fill the pan.
15. Place dollops of the remaining filling on top.
16. With a butter knife, gently swirl the filling into the batter, running the knife lengthwise and crosswise through the layers.
17. Bake until a cake tester inserted into the brownies (avoid center and edges) comes out with a few crumbs but is not wet, about 45 minutes.
18. Let cool slightly in the pan, about 15 minutes.
19. Lift out the brownies; let cool completely on a wire rack before cutting into squares.

unsalted butter, chocolate, chocolate, allpurpose, baking powder, salt, sugar, eggs, vanilla, unsalted butter, confectioners sugar, smooth peanut butter, salt, vanilla

Taken from www.epicurious.com/recipes/food/views/peanut-butter-swirl-brownies-393183 (may not work)