The debate here usually focuses on whether the bananas should be mashed into the custard or layered in slices at the bottom.
This is the standard for most "cream" pies (like Chocolate or Banana Cream). The debate here is usually over stabilized whipped cream versus fresh, which can weep over time. creampie debate
Purists argue that a true cream pie should be thickened with cornstarch or flour. This results in a soft, pudding-like texture that "slumps" slightly when sliced. The debate here usually focuses on whether the