Step 1

Preheat the oven to 350 degrees Fahrenheit. Grease a 9x13-inch or disposable foil pan with oil or butter.

Step 2

In a large bowl, beat together bananas and eggs with an electric mixer at medium speed until the bananas are mashed, about 1 minute.

Step 3

Reduce the mixer speed to low and pour the melted butter. Increase speed to medium and beat in the cake mix and milk until combined, about 2 minutes.

Step 4

Pour the batter into the greased pan. Bake for 30 to 40 minutes or until the cake is firm in the center.

Step 5

Let the banana cake cool completely in the pan.

Step 6

Meanwhile, prepare the frosting. In a small saucepan over medium-high heat, mix together the sugar, milk, and butter. Bring to a full boil, stirring constantly with a whisk.

Step 7

Remove from heat and mix in the powdered sugar until completely dissolved.

Step 8

Pour the frosting over the cooled cake. Let the frosting cool completely before slicing. Enjoy!

Step 9

Note: The recipe yields a thin frosting. Double it for more!