Elvis on a Rocky Road Bundt Cake ~ Peanut butter, banana & chocolate chip cake is topped with chocolate ganache, peanut butter glaze, walnuts, and marshmallows.
This bun is perfectly toasted with a golden colour on the outside, soft inside, a perfect sprinkling of black sesame seeds on top, and it can hold the weight of the burger and its toppings.
I wish I could write the definition what a perfect burger is once and for all, but that is not on me. I can only offer you some directions and hope to help you a bit, or at least share with you one more option.