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["Preheat oven to 325 degrees (175 C.).", "Butter 2 9"" round cake pans, line w/wax paper.", "Butter and flour lined pans.", "In bowl, sift together flour, soda, and salt.", "In a large bowl beat butter w/electric mixer.", "Add sugar a little at a time beating till fluffy.", "Add eggs, zest, and vanilla and beat well.", "1/3 Add dry ingredients alternately with 1/2 of the buttermilk and mix well.", "1/3 Add more dry ingredients, then buttermilk and mix well.", "End with 1/3 dry ingredients and beat until smooth.", "Divide between pans, smooth surface and rap each pan on countertop to expel bubbles.", "Bake 45 minutes or until tests done.", "Cool on racks 20 minutes.", "While cake is baking mix oj and sugar in small bowl until sugar dissolves.", "While cake is still warm poke holes at 1/2"" intervals with a fork.", "Spoon syrup over layers.", "Cool layers completely.", "Make filling by melting marmalade in in microwave until just melted(watch closely).", "Cool 5 minutes.", "In bowl whip cream with sugar until firm peaks form.", "Whisk in sour cream, a little at a time until of spreading consistency.", "Put one layer of cake on serving plate and peel off wax paper.", "2/3 Spread of marmalade on top of layer.", "Invert second layer on top of first layer.", "Spoon remaining marmalade on top of cake, leaving 1 1/4"" border around edge.", "Frost sides and border with frosting or frost all of the cake and add marmalade as garnish.", "Chill two hours before serving."]