Good-Cooking - Apple Cake with Marzipan Filling

Ingredients

• 9 ounces butter
• 8 ounces granulated sugar
• 12 ounces self-rising flour
• 6 large eggs
• 2 tablespoons Calvados apple liqueur
• 1 cooking apple, like golden delicious
• 6 ounces butter
• 6 ounces confectioners' sugar
• 1 tablespoon Calvados
• 1 (4 ounce) package marzipan
• 1/2 teaspoon cinnamon