In your stand mixer or with a hand mixer, cream together the shortening (or butter and oil), the sugar, and the eggs.
Add in the mashed bananas, buttermilk, and vanilla. Mix well.
Next, add the flour, baking soda, and salt. Mix until well combined.
Using a cookie scoop or a spoon, put about 2 tbsp of batter down, making sure to place the batter scoops 2 inches apart on a large cookie sheet. You should be able to fit 12 cookies on one cookie sheet.
Bake at 350 degrees for 10-11 minutes.
Frost while warm if you want them to be glazed, or wait until they have cooled if you want them to look like the cookies in my pictures.
TO MAKE THE FROSTING:
Using your hand mixer, cream together the butter, powdered sugar, vanilla, salt, and 2 tbsp of evaporated milk or heavy cream. Mix until fluffy, adding up to two more tablespoons of the evaporated milk or cream if needed.
Spread a thin layer of frosting on each cookie and ENJOY!
Recipe by Real Life Dinner at https://reallifedinner.com/the-best-banana-cookies/