To prepare a strawberry napoleons recipe, first you need to gather your ingredients. First, you will need the following ingredients: 1 cup fresh strawberries 2 cups granulated sugar 2 tablespoons butter (or margarine) 1 tablespoon vanilla extract 2 teaspoons cinnamon 1 teaspoon nutmeg 1 tbsp. ground cardamom Instructions: Preheat the oven to 375 degrees F (190 degrees C). Grease and flour two 9x9-inch baking pans and set aside. Cut the strawberries in half lengthwise and scoop out the seeds. Place the sliced strawberries into the prepared pan. Pour the syrup over the fruit. Bake for 20 minutes or until the filling is bubbly and the top is browned. Remove the pan from the heat and stir in the powdered sugar. Let the mixture cool for 5 minutes before serving.