Cake: In a mixing bowl combine flour, sugar, baking powder, baking soda and cinnamon. Add carrots, oil and eggs. Beat with electric mixer until combined. Pour into 2 greased and floured 9 x 1 1/2 inch round baking pans. Bake at 350 degrees for 30 to 35 minutes. Cool on wire racks for 10 minutes. Remove cakes from pans. Cool thoroughly on racks. Frosting: Cream together butter and cream cheese. Add sugar, vanilla and pecans. Spread on cake. Yields: 12 to 15 servings