Overripe bananas are mushy and have a deep flavor.
Crushed Oreos should be added in both topping and base for a chocolatey crunch in every bite
Brown sugar helps in providing moisture and deep flavor along with the crunch
Overmixing introduces air which makes the cupcakes dry and dense instead of spongy
Oreo and bananas are naturally sweet so add sugar and other sweeteners carefully
Addition of sour cream or Greek yogurt enhances the moisture and gooeyness of the cupcakes.
Start baking at 220°C for 5 minutes then reduce the heat to 175°C. This gives the cupcake a high dome shape and keeps the inside fluffy.