Prep the pan: Heat your oven to 350°F (175°C). Line a 9x5-inch loaf pan with parchment paper and lightly oil the sides.
Mash the bananas: In a large bowl, mash the bananas with a fork until mostly smooth with a few small lumps left.
Whisk in the wet ingredients: Add the egg, yogurt, maple syrup, oil, and vanilla.
Whisk until well combined and creamy.
Add dry ingredients: Sprinkle flour, baking powder, baking soda, cinnamon, and salt over the top. Stir with a spatula until just combined. Do not overmix—a few streaks of flour are okay.
Fold in extras: If using mini chocolate chips or soft fruit (like small diced strawberries or blueberries), fold them in gently.
Fill the pan: Scrape the batter into the prepared loaf pan and smooth the top. For a prettier loaf, add a few banana slices on top.
Bake: Bake for 45–55 minutes, until the top is golden and a toothpick comes out mostly clean with a few moist crumbs. Tent with foil after 35–40 minutes if the top browns too fast.
Cool completely: Let the loaf rest in the pan for 10 minutes, then lift it out with the parchment and cool on a rack for at least 45 minutes before slicing.
This keeps it moist and prevents crumbling.
Serve toddler-style: Cut into thin slices or small cubes. For very young eaters, spread with a little nut butter, yogurt, or mashed banana.