This is the only banana muffin recipe you will ever need.
Line the muffin pan with the muffin cups.
Set oven temp to 350 degrees.
In a mixer. Cream together butter and sugar until fluffy. Add the bananas and eggs and mix well.
In a medium bowl combine flour, baking powder, baking soda and salt. Add this to the banana mixture.
Mix on medium speed 1-2 minutes until batter is light in color and fluffy.
Add the sour cream. Mix until combined.
Pour in the chocolate chips and mix by hand to incorporate.
With a large spoon fill the muffin cups 3/4 full with the banana muffin batter. Sprinkle with the streusel.
Bake for 20 min or until toothpick comes out clean.
Cool
Enjoy.