Preheat oven to 375 degrees F (190 degrees C). Grease and flour a 8×4 inch loaf pan.
In a large bowl, cream butter and sugar until light and fluffy. Add sour cream and eggs.
Add flour and pinch of soda, mix well. Pour into a 8×4 inch loaf pan.
Bake at 375 degrees F (190 degrees C) for 1 hour, or until a toothpick inserted into center of cake comes out clean.
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