Combine raisins & bourbon in small glass bowl and warm in microwave. Remove and set aside.
Heat oven 350 degrees and spray 9 X 12 pan with pancoat & dust with flour. In medium bowl combine flour, baking soda, spices & salt. Set aside.
In large bowl combine oil, granulated sugar, brown sugar & eggs. Beat with mixer until well combined. On low speed add flour mixture -- JUST UNTIL COMBINED. Using slotted spoon, list out raisins from heated bourbon & add them to cake mixture saving liquid for frosting. Fold carrots & nuts until evenly distributed. Pour into prepared baking pan. Bake 40 minutes or until toothpic comes out fairly clean.
FOR FROSTING: In large bowl mix butter & cream cheese until smooth. Beat in vanilla & reserved Tennessee's Best. Slowly beat in confectioners sugar. May need to add additional confectioners sugar for spreadable consistancy. Spread over cooled cake. This is a rich cake so serve in small pieces. ENJOY!