01 - 
                Preheat oven to 350°F (175°C). Line the bottoms of three 8-inch round cake pans with parchment paper and grease the sides.
              
              
              
                02 - 
                In a large bowl, whisk together flour, sugar, cocoa powder, baking soda, baking powder, and salt.
              
              
              
                03 - 
                In another bowl, whisk together milk, vegetable oil, vanilla extract, and eggs.
              
              
              
                04 - 
                Slowly mix wet ingredients into dry ingredients, then whisk in hot water until batter is smooth and thin.
              
              
              
                05 - 
                Divide batter evenly among pans and bake for 22–25 minutes until a toothpick inserted in the center comes out clean. Cool for 2–3 minutes, then transfer to wire racks.
              
              
              
                06 - 
                Beat butter and peanut butter until smooth. Add half the powdered sugar, followed by 3 tablespoons of liquid. Mix in remaining sugar and adjust consistency with additional liquid as needed.
              
              
              
                07 - 
                Level cooled cake layers. Place one layer on a serving plate, spread 1 cup frosting, sprinkle half of the chopped Reese’s, and add a thin layer of frosting. Repeat with the second layer. Place the third layer on top.
              
              
              
                08 - 
                Apply a crumb coat, then frost the entire cake smoothly with remaining frosting.
              
              
              
                09 - 
                Heat heavy cream until just boiling. Pour over chocolate chips, let sit 2 minutes, then whisk until smooth.
              
              
              
                10 - 
                Drizzle ganache over cake edges and spread over the top. Let set 10 minutes before garnishing with halved and crumbled Reese’s.