Swedish Princess Cake Prinsesstårta

Ingredients

• 4 eggs
• 1 cup sugar
• 1/2 cup flour
• 1/2 cup potato flour or, 70g cornstarch
• 1 teaspoon baking powder
• 1/8 teaspoon salt
• 1 cup heavy cream
• 4 egg yolks
• 3 tablespoons corn starch
• 1/4 cup granulated sugar
• 1 teaspoon vanilla extract
• 1/4 ounce unflavored gelatin powdered
• 2 tablespoons cold water
• 2 cups heavy cream whipped
• 1/4 cup powdered sugar
• 1 teaspoon vanilla extract
• 1/3 cup vanilla American buttercream frosting recipe here
• 1/3 cup raspberry jam
• powdered sugar for dusting
• 1 pound marzipan prepared
• 1 leaf green food color
• icing Ready made rose, decorations I used Wilton, optional
• food color Baker’s rose
• extract Clear, any flavor