Start by preheating your oven to 350°F (177°C). This moderate temperature is critical for gluten free baked goods—higher heat can cause the exterior to set before the interior bakes through, creating a dense center. While the oven heats, thoroughly spray a 4x8 inch loaf pan with cooking spray, making sure to coat the bottom and all four sides. This prevents sticking and makes removal effortless. Some bakers line with parchment paper for extra insurance; I find this unnecessary with proper spraying, but it's an excellent make-ahead step if you're prepping multiple pans the night before an event.

In a large mixing bowl, add your mashed bananas—I use a fork to break them down completely until you have a mostly smooth consistency with just a few small banana pieces remaining. Immediately add the baking soda and stir thoroughly. You'll notice the mixture bubble slightly as the baking soda reacts with the bananas' acids; this is exactly what you want. This reaction contributes to lift and tenderness. If you're scaling this recipe, mash bananas directly in the bowl before measuring to ensure accurate portions. Let this sit for exactly 1-2 minutes while the reaction settles.

Pour the melted butter (cooled for about 3-4 minutes so it doesn't cook your eggs) into the banana mixture and stir until combined. The batter should look smooth and glossy at this point. Next, add your beaten eggs, stirring constantly to incorporate them evenly. The mixture will lighten slightly. Add the vanilla extract and stir well. At this stage, if you're making this for someone with nut allergies, you'd already be planning ahead—this is an excellent point to assess allergen concerns before proceeding to dry ingredients.

In a separate small bowl, whisk together your gluten free flour blend, xanthan gum (only if needed—check your flour's label first), and salt. Whisking instead of just stirring helps distribute the xanthan gum evenly, which prevents lumps in your finished loaf. Gently fold the dry ingredients into your wet ingredients using a spatula or wooden spoon—fold rather than stir to avoid overmixing, which can develop toughness even in gluten free baking. Fold just until no flour streaks remain. If you're adding nuts or cinnamon, fold them in at this final moment.

Pour your batter into the prepared loaf pan, smoothing the top gently with a spatula. Place the pan on the center rack of your preheated oven. Bake for 50 minutes to 1 hour, checking at the 50-minute mark with a toothpick inserted into the center. The toothpick should come out clean or with just a few moist crumbs—not wet batter. Every oven bakes differently based on calibration and air circulation, so this is critical. If the top begins browning too quickly, tent with foil during the final 15 minutes. Remove from the oven when a toothpick test succeeds, and the loaf should spring back slightly when lightly pressed.

Allow the banana bread to cool in the pan for approximately 10-15 minutes. This resting period allows carryover cooking to finish and the crumb structure to set. Run a thin knife around the edges of the pan and invert onto a wire cooling rack. The bread should release easily if you've sprayed properly. Allow it to cool completely before slicing—I know the aroma is tempting, but slicing warm bread can cause crumbling. Completely cooled bread slices cleanly and beautifully, revealing that tender, moist crumb everyone will love.