Chocolate-Peanut Butter Fun Cake

• Nonstick vegetable oil spray
• 1 1/4 cups all-purpose flour
• 1 cup sugar
• 3/4 cup natural unsweetened cocoa powder
• 1 1/2 teaspoons kosher salt
• 1 teaspoon baking soda
• 1/4 cup vegetable oil
• 1 teaspoon vanilla extract
• 1/2 cup finely chopped semisweet or bittersweet chocolate (3 1/2 ounces)
• 1/2 cup sugar
• 1/4 cup egg whites (from about 2 large eggs)
• 1 1/2 teaspoon vanilla extract
• 1/4 cup creamy peanut butter
• 6 tablespoons (3/4 stick) chilled unsalted butter, cut into 1/4" cubes
• Kosher salt
• 1/4 cup chopped semisweet or bittersweet chocolate (about 1 3/4 ounces)
• 1/4 cup chopped unsalted, dry roasted pinenuts
• An 8x8x2" cake pan

1. Preheat oven to 350u0b0F. Coat bottom and sides of pan with nonstick spray; line bottom of pan with parchment paper. Whisk flour and next 4 ingredients in a large bowl. Add oil, vanilla, and 1 1/4 cups water; whisk until smooth. Fold in chopped chocolate. Scrape into prepared pan; smooth top. Bake until a tester comes out clean when inserted into center, 35-40 minutes. Let cool completely in pan on a wire rack.
2. Combine sugar and egg whites in a medium metal bowl set over a saucepan of simmering water. Whisk constantly until sugar dissolves and mixture is hot to the touch, 3-4 minutes. Remove from heat; using an electric mixer, beat on high speed until cool and thick, 5-6 minutes. Beat in vanilla, then peanut butter. With mixer running, add butter a few pieces at a time, beating to blend between additions. Season with salt.
3. Run a thin knife around pan to release cake. Invert cake onto a serving plate. Spread peanut butter buttercream over top. Garnish with chopped chocolate and peanuts. DO AHEAD:
4. Cut into 2" squares.

vegetable oil spray, flour, sugar, natural, kosher salt, baking soda, vegetable oil, vanilla, bittersweet chocolate, sugar, egg whites, vanilla, peanut butter, butter, kosher salt, bittersweet chocolate, pinenuts, cake pan

Taken from www.epicurious.com/recipes/food/views/chocolate-peanut-butter-fun-cake-394664 (may not work)