Mix flour and sugars in a small bowl, stir in melted butter, creating crumbs, set to side
In a food processor, mix eggs, milk, banana, oil, juice and essence to a smooth consistency
In a bowl, mix flour, sugars, BP, salt, until completely combined, and make a well in center
Preheat oven to 400 F
Grease muffin pan, am using large muffin pan, of 6 muffin holes
Pour banana mixture into flour mixture, mix until just combined
Divide batter into 6 muffi holes, then top with the Crumb topping
Bake for 18-20 mins