Preheat oven to 350 degrees. Grease a 9×13 inch pan or line with parchment paper.
Grate carrots and chop pecans.
In a large bowl, whisk together eggs, oil, white sugar, brown sugar, sourdough starter and vanilla.
In a separate bowl, mix the flour, baking soda, baking powder, salt and cinnamon.
Add the dry ingredients into the wet ingredients until just incorporated. Try not to over mix.
Stir in carrots and fold in pecans.
Pour into prepared pan.
Bake in the preheated for 40 to 50 minutes.
Allow to cool before frosting.
To a stand mixer, add softened cream cheese and butter. Whip together for a few minutes.
Slowly pour in confectioners’ sugar and vanilla.
Whip until nice and fluffy.
Fold in chopped pecans (optional).
Frost cooled cake.