Preheat your oven to 350°F (175°C). This ensures that the banana bread bakes evenly.
Grease your loaf pan with butter or line it with parchment paper for easy removal after baking.
In a mixing bowl, whisk together the all-purpose flour, baking soda, baking powder, and salt until well combined. Set aside.
In another bowl, cream together the softened butter and sugar until light and fluffy. This should take about 2-3 minutes using a hand mixer or a stand mixer.
Add the eggs one at a time to the butter and sugar mixture, mixing well after each addition. Then, stir in the mashed bananas, fresh lemon juice, and vanilla extract until fully incorporated.
Gradually add the dry ingredients to the wet mixture, stirring just until combined. Be careful not to overmix; a few lumps are perfectly fine.
Pour the batter into the prepared loaf pan and smooth the top with a spatula. Bake in the preheated oven for 60-65 minutes or until a toothpick inserted into the center comes out clean.
Once baked, remove the banana bread from the oven and let it cool in the pan for about 10 minutes. Then, transfer it to a wire rack to cool completely before slicing.