BANANA CHOCOLATE CHIP MUFFINS

BANANA CHOCOLATE CHIP MUFFINS Makes 12- 3ounce muffins Bake at 450F for 10 minutes; reduce oven temp to 325F, and bake for another 15 minutes or until almost firm. 2 cups all-purpose flour ¾ cup white sugar 1 tablespoon baking powder ½ teaspoon baking soda 1 cup fresh milk 1 tablespoon white vinegar ½ cup melted butter (salted) 1 pc whole egg 4-5 pcs chopped bananas 1 cup dark chocolate chips Pinch of salt, if using unsalted butter