Step 1

Set the oven to 350F

Step 2

Beat the butter and sugar together for several minutes until smooth and fluffy. Beat in the egg and vanilla.

Step 3

Mix in the mashed banana, and then the flour and salt. Mix just until everything is well blended, don't over mix.

Step 4

Spread into an 9x9 square baking dish. I like to spray the dish with baking spray and also line it with parchment paper with long ends so I can lift it out to frost and cut it easily.

Step 5

Bake for 25 to 30 minutes, until the center is set. I check with a toothpick.

Step 6

Let the cake cool most of the way before you make the frosting.

Step 7

To make the caramel frosting put the butter, brown sugar and milk or cream in a small saucepan and melt the butter, whisking all the time. Continue whisking until the mixture comes to a boil, then turn off the heat and add the sifted powdered sugar, whisking until completely smooth. You may need to add a little bit more powdered sugar if it seems very thin.

Step 8

Spread it immediately onto the cake, it will set up very quickly.

Step 9

Enjoy!