Preheat oven to 350 degrees
Mix flour, baking soda, salt, and sugar
Add eggs, oil, and vanilla
Fold in grated carrots and walnuts
Bake at 350 for 30 minutes
Add cream cheese to a bowl
Combine with butter and cream cheese in the bowl
Mix in powdered sugar and vanilla
Finally, stir in powdered sugar and mix until smooth and conditioned
