Prep the pan and oven: Preheat your oven to 350°F (175°C).
Line a 9x5-inch loaf pan with parchment, leaving overhang for easy lifting. Lightly grease the sides.
Mash the bananas: In a large bowl, mash the bananas until mostly smooth with a few small lumps. You want about 1 1/4 cups total.
Whisk in the wet ingredients: Add eggs, maple syrup, olive oil, and vanilla.
Whisk until glossy and well combined.
Combine the dry ingredients: In a separate bowl, whisk almond flour, oat flour, ground flaxseed, baking powder, baking soda, salt, and cinnamon.
Bring it together: Add dry ingredients to the wet mixture. Stir gently with a spatula until no dry streaks remain. Fold in any optional add-ins.
Fill and level: Scrape batter into the prepared pan.
Smooth the top. For a café-style look, slice a small banana in half lengthwise and lay the halves on top (optional).
Bake: Bake 45–55 minutes, or until the top is set, deeply golden, and a toothpick comes out with a few moist crumbs. If browning too quickly, tent with foil for the last 10 minutes.
Cool properly: Cool in the pan for 15 minutes, then lift out and cool on a rack at least 1 hour before slicing.
This sets the crumb.
Slice and enjoy: Cut into 10–12 slices. Serve plain, toasted with almond butter, or with a smear of coconut yogurt.