There layer of sweet espresso cake filled with creamy Banana-Scotch buttercream and topped with crispy dried bananas.
Preheat oven to 350F . Line 3 8" pans or 4 6" pans with parchment paper and grease the sides.
Whisk the milk , egg whites and vanilla extract and set aside.
In a bowl of a standing mixer, place the flour,espresso powder sugar,salt and baking powder. Using the paddle attachment, mix on low to combine.
Increase speed to medium and add the butter one piece at a time until the mixture is moist and crumbly.
Add half a cup of the liquid mixture into the mixer bowl, once the liquid is in incorporated let it mix for about 1 minute.
Add the remaining of the liquid mixture. Mix just to combine.
Divide the batter between the pans and bake in the middle rack for 18-20 minutes for ,or until a toothpick comes out clean from the center of the cake.
Using a hand whisker, mix the egg whites, cream of tartar and sugar in a bowl of a standing mixer. Place the bowl on top (not inside) of a pan filled 1/4 way with simmering water.
Keep whisking the egg white mixture until it thickens and warms up to 150F. (or just until it is too hot for your finger to be dipped in.)
Move the bowl to the standing mixer and mix on high with the whisk attachment until a cool and a very stiff, shiny meringue had formed.
With the mixer on high, add the butter in small pieces following the vanilla extract and salt.
Keep mixing until a smooth airy and fluffy butter cream is formed.
Add the banana scotch to the buttercream and mix to combine.
Place the coffee and sugar in a saucepan over the stove and allow to boil.
Remove from heat.
Place one layer on top of a serving dish. Soak the cake with 1/3 cup of coffee syrup and spread 1/3 cup of buttercream on top and place the second layer of cake of top and repeat.
Use the remaining of the buttercream to frost the cake and decorate with the dried banana chips.