Banana Bread Cake with Cream Cheese Frosting

Ingredients:

For the Banana Bread Cake:

1 ½ cups mashed ripe bananas (about 3-4 bananas)
2 cups all-purpose flour
1 teaspoon baking soda
¼ teaspoon salt
½ cup unsalted butter, softened
1 cup granulated sugar
½ cup brown sugar, packed
2 large eggs
1 teaspoon vanilla extract
½ cup buttermilk (or milk with 1 tablespoon lemon juice/vinegar as a substitute)

For the Cream Cheese Frosting:

8 oz cream cheese, softened
½ cup unsalted butter, softened
3-4 cups powdered sugar (adjust to desired sweetness)