Marissa's Butterfinger Cake for my Birthday

My daughter, Holly, made Marissa's  Birthday.  It was so delicious.  However, a funny thing happened.  She brought butterfingers home and my little Granddaughter ate one of the Butterfingers, no knowing that they were for the cake.  So we had half Butterfingers and half Reese's Peanut Butter Cups on the cake.  Loved it!