01 -
Preheat the oven to 350°F. Line a jelly roll pan with parchment paper, leaving an overhang on the sides, and lightly grease the parchment. Lay a clean kitchen towel flat and dust it generously with powdered sugar; set aside.
02 -
In a medium bowl, whisk together all-purpose flour, cocoa powder, baking powder, and salt until evenly mixed.
03 -
In a large bowl, beat the eggs and granulated sugar on high speed for 4 to 5 minutes, until the mixture is thick, pale, and has tripled in volume.
04 -
Add vegetable oil, vanilla extract, and milk to the egg mixture, folding gently until just combined.
05 -
Gently fold the dry ingredients into the wet mixture using a spatula, mixing until no streaks remain.
06 -
Pour the batter evenly into the prepared pan and smooth the top. Bake for 10 to 12 minutes, or until the cake springs back lightly when touched.
07 -
Immediately invert the hot cake onto the prepared sugared towel. Carefully peel off the parchment paper. Starting from the short end, roll the cake with the towel inside and let it cool completely while rolled.
08 -
In a bowl, beat the peanut butter and powdered sugar until smooth. Add heavy cream and vanilla extract, beating until light and spreadable. Fold in the chopped peanut butter cups gently.
09 -
Carefully unroll the cooled cake. Spread the peanut butter filling evenly over the surface, leaving a consistent border around the edges. Re-roll the cake tightly without the towel and place seam-side down on a serving platter.
10 -
Heat heavy cream just until steaming. Pour over semi-sweet chocolate chips and let sit for 2 minutes. Stir until smooth, then drizzle or spread the ganache over the cake. Allow to set before slicing.