The short answer is: no, banana pancakes shouldn't be gooey. They should be moist, sure, but not mushy. If they're gooey then they're either not cooked through all the way or you've added too much banana. You might want to go all-in on the bananas and maybe add 3 or 4 because you have them to use, but that would be a mistake. Two is plenty in this healthy banana pancakes recipe.  One other reason you could have gooey pancakes on the inside is that you've got your pan or griddle up too high and it's cooking the outside much faster than the inside. A medium heat is plenty. Be patient, they will uniformly cook in no time.