Preheat oven to 350 degrees. Cream butter and sugar until fluffy. Add eggs one at a time. Sift flour, soda and salt together; alternating add flour and sour cream to butter mixture. Add vanilla and mix.
Pour mixture into three 9-inch greased pans. Bake for 25-35 minutes. Test for doneness. Remove from oven and cool completely.
For the frosting, melt butter, add brown sugar and milk. Cook 2 minutes over medium heat stirring constantly. Remove from heat; add vanilla and pour over confectioners’ sugar. Beat until smooth. Let cool slightly. Frost layers.
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