01 -
Preheat oven to 350°F (175°C) and grease and flour two 8-inch round cake pans.
02 -
In a medium bowl, whisk together flour, baking soda, and salt. Set aside.
03 -
In a large bowl, cream unsalted butter and granulated sugar until the mixture is light and fluffy.
04 -
Beat in eggs one at a time, then blend in the vanilla extract.
05 -
Mix in sour cream and mashed bananas until fully incorporated.
06 -
Gradually add dry ingredients to the wet mixture, mixing just until combined.
07 -
Gently fold in chopped walnuts and white chocolate chips.
08 -
Evenly divide batter between prepared pans. Bake for 30 to 35 minutes, or until a toothpick inserted in the center comes out clean.
09 -
Let cakes cool in pans for 10 minutes, then transfer to a wire rack to cool completely.
10 -
Once cooled, spread half of the creamy custard on top of one cake layer.
11 -
Position second cake layer over the first and cover evenly with remaining custard.
12 -
Arrange banana slices and walnuts over the top. Serve immediately or refrigerate until ready to serve.