If you don’t have or wish to use bananas, they can be replaced with 1 1/2 cups buttermilk, a half-half mixture of yogurt and milk, or with a non-dairy milk. You will not need the 3 to 5 tablespoons milk a the end. You may, find, however,
that without the banana, that the recipe tastes better with 1 tablespoon each sugar (brown, white, or a liquid sweetener)
and melted butter or oil added too.
Use fork to stir in cinnamon and egg, then baking powder until thoroughly combined. Stir in flour, then add milk as needed; I found 3 to 4 tablespoons just right (but thickness of batter will vary with banana size, so for medium bananas, more liquid will be needed) to create a thick but not cookie-dough like batter.
Heat griddle or frying pan over medium-low. Once hot, add a good pat of butter or drizzle of oil, and add pancakes in 1/4-cup mounds. You can flatten them a bit if they’re particularly thick. Cook until lightly browned underneath and bubbles appear in pancake surface, flip, and cook on the second side. Lower heat is better on these pancakes; they brown fast and cooking them more slowly ensures the centers are set when the edges are the right color. Repeat with remaining batter. Eat immediately.