Preheat your oven to 350°
Line your muffin tin with paper liners, silicone liners, or spray with non-stick cooking spray
In a large bowl, add in your flour, salt, baking powder, baking soda and mix together with a fork. Then add in your melted butter, and milk.
In small bowl, whisk together your eggs and add them into the large bowl.
In another small bowl, mash the bananas with a fork or potato masher and then add them into the muffin mixture.
Stir everything together and then fold in the chocolate chips and walnuts.
Pour ⅓ cup or a scant 2 tbsp. of the muffin batter into the liners.
Bake for 18 minutes then start to check to see if they are done. If they are not completely done after sticking a cake tester or toothpick into the muffin, place back into the oven and cook at 2 minute increments.
After removing from the oven, let cool for 5 minutes, remove from the muffin tin, and place on a wire cooling rack to finish the cooling process. Or enjoy these delicious muffins right from the oven.