Tender cinnamon cake layers with a cinnamon sugar spread and white chocolate ganache filling and cinnamon sugar frosting.
After cakes are cooled and chilled, divide each cake in two, horizontally. Place your first cake layer, face up, on a cake plate or foil wrapped cardboard. Spread the cake with about 1/2 cup of buttercream and then three tablespoons of the cinnamon sugar filling, followed by a drizzle of the white chocolate ganache.
Place your next cake layer on top and repeat.
Crumb coat the cake with the brown sugar frosting and chill for 15 minutes.