Preheat oven to 350° and grease a bundt pan with cooking spray. In a large bowl, combine cake mix, instant pudding, eggs, water and butter.
Beat with a hand mixer until smooth and well combined. Pour batter into prepared pan and bake until a toothpick inserted into the cake comes out clean, about 45 minutes.
Let cake cool in pan for 10 minutes, then invert onto a cooling rack to cool completely. When the cake is cool, carefully place it back in the Bundt pan.Using a teaspoon or melon baller, scoop out 6 to 8 large holes around the bottom of the cake, making sure not to cut through the top of the cake.
Make the filling: Using a hand mixer, mix the butter and peanut butter until combined. Add the powdered sugar and heavy cream, then beat on medium until fluffy. Transfer filling to a large piping bag.
Pipe filling into the holes on the bottom of the cake, then carefully invert the cake onto a serving platter.
Drizzle with chocolate and peanut butter, cover with Reese’s.
Recipe by Cooking TV Recipes at https://cookingtv-channel.com/reeses-bundt-cake/