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["For the starter:", "Mix 2 cups flour with 2 cups cold water in a quart jar. Stir until smooth and let set out on counter for 3 days, stirring occasionally with a wooden spoon. You can use the starter after 3 days, but leaving it out as long a week develops even more ""sour"" notes. After this time, cover tightly and keep in the refrigerator indefinitely. For each use, take the starter out the night before and add 1 cup flour and 1 cup water. It will separate after some time in the refrigerator but should develop a dark but clear layer on top that can easily be stirred back into the flour that settles to the bottom.", "", "", "For the cake:", "Preheat the oven to 350 degrees.", "Spray a 9 X 13 pan with non-stick spray.", "Put all ingredients in order listed into a large mixing bowl. Beat for two minutes at medium speed. Pour into prepared pan and bake for 55 minutes. This cake will not test done, but is done after 55 minutes. Cool and top with cream cheese frosting.", "", "For the Frosting:", "1 stick butter", "8 oz. cream cheese", "Soften at room temperature.", "When soft and pliable, mix butter and cream cheese on medium speed of mixer until creamy. Slowly add 2 cups SIFTED powered sugar and blend until well incorporated. By hand, stir in 1 tsp. vanilla.", "Spread over cool cake, adding walnuts, if desired."]
